The document examines whether the running-based anaerobic sprint test (RAST) can predict anaerobic capacity as measured by maximum accumulated oxygen deficit (MAOD). Eleven trained runners completed a RAST and tests to determine MAOD. No significant correlations were found between any RAST variables (peak power, mean power, fatigue index, maximal velocity, mean velocity) and MAOD. The study concludes that RAST does not predict anaerobic capacity in runners as measured by MAOD.
This document summarizes a study that compared the effects of sprint interval training (SIT), endurance training (ET), and a combined training protocol (COMB) on physiological parameters and exercise performance over an 8-week training period. 29 participants were matched and randomly assigned to SIT, ET, COMB, or a control group. The SIT group did 5-8 repetitions of 5-second sprints twice a week, the ET group cycled for 40-60 minutes at 60% VO2peak three times a week, and the COMB group did a combination. Testing before and after training measured VO2max, anaerobic threshold, cardiovascular parameters, blood markers, and performance. Results showed improvements in resting
Effects of Eccentric Strength Training’s Time on Daily Plasma Testosterone Le...IOSR Journals
This study aims to evaluate the effects of the eccentric physical training’s time on daily plasma concentrations of testosterone among sedentary athletes. Sixty male athletes, with homogeneous age, size and weight were selected for the study during three months. They were subjects to a strength training of the extensor and flexor muscles of the knee. After they were divided in two groups of thirty subjects and then had physical training either in the morning between 6 and 7, or in the evening, between 16 and 17. The dosage of testosterone on each athlete was performed before and after submission to an eccentric physical program at the antecubital vein in a restful sitting. Our results have shown that eccentric physical training induces the increase of this steroid hormone in the two groups of athletes and the training in the evening promotes better its production. Our results also showed that the rate of this androgen drop significantly during the day in both groups of athletes trained in the morning or in the evening as well as their respective controls. However, the decline was even more pronounced for subjects trained in the morning
This study aimed to compare VO2max scores in wheelchair athletes using an upper-body ergometer and a new wheelchair ergometer prototype. Ten male wheelchair basketball players performed VO2max tests on both ergometers. No significant differences were found between the ergometers, though there was a trend toward higher scores on the wheelchair prototype. Data screening removed outliers due to large differences in body mass. While inconclusive, the study provided insights to improve the wheelchair ergometer prototype for better testing wheelchair athletes' aerobic fitness.
This study evaluated a new method of monitoring exercise training called the session rating of perceived exertion (RPE) method. The session RPE method uses a participant's perceived exertion after a training session as a marker of training intensity. The study compared the session RPE method to an objective heart rate (HR) monitoring method during steady state and interval cycling, as well as basketball practice. It found a consistent relationship between the two monitoring methods, though the session RPE scores were generally higher. Even with different subjects, the relationships between the methods were similar. The study concluded the session RPE method is a valid way to quantify training during various types of exercise when objective monitoring is not possible.
Familiarization, reliability, and evaluation of a multiple sprint running tes...Pablo Vicencio Ardiles
This study investigated the use of self-selected recovery periods in a multiple sprint test to reliably quantify an individual's ability to resist fatigue. Twenty active students completed 4 trials of 12 x 30m sprints with self-selected recovery between sprints. The results showed learning effects in the first 2 trials as evidenced by more subjects failing to maintain sprint performance. Reliability was good between trials 3 and 4, with a coefficient of variation of 11.1% and intraclass correlation of 0.76. Perceived exertion increased progressively throughout trials despite no change in sprint times. Aerobic fitness showed little correlation with mean recovery time.
1) A study compared the hormonal, neuromuscular, and recovery responses between forced repetition (FR) training and maximum repetition (MR) training. FR resulted in greater decreases in muscle force and activity compared to MR.
2) Several studies examined the effects of forced repetitions, finding they induce greater acute hormonal and neuromuscular responses than traditional training and may overload the neuromuscular system more, especially for strength athletes.
3) Other training techniques like tri-sets, drop sets, and rest-pause were also examined in studies and found to effectively increase metabolic and mechanical stresses through greater time under tension, workload, and muscle recruitment compared to traditional sets performed to failure.
1) A study investigated the effects of 22 weeks of periodized soccer training focused on technical-tactical ability in young players.
2) The training reduced markers of muscle damage (CK and LDH levels) over time and improved high-intensity performance and tactical metrics in games.
3) Players who saw greater reductions in muscle damage markers also had larger increases in high-intensity actions during games.
This study examined the effects of a 6-week isokinetic resistance training program on quadriceps and hamstrings peak torque and standing long jump performance in 12 untrained men. The training consisted of 3 sets of 10 repetitions at 100°/s, 3 days per week for 6 weeks. After training, quadriceps peak torque increased by an average of 10.5% but there was no significant change in hamstrings peak torque or standing long jump performance. The major finding was that gains in isokinetic strength did not translate to improvements in functional performance, likely due to the training lacking eccentric loading which is an important component of the standing long jump.
This document summarizes a study that compared the effects of sprint interval training (SIT), endurance training (ET), and a combined training protocol (COMB) on physiological parameters and exercise performance over an 8-week training period. 29 participants were matched and randomly assigned to SIT, ET, COMB, or a control group. The SIT group did 5-8 repetitions of 5-second sprints twice a week, the ET group cycled for 40-60 minutes at 60% VO2peak three times a week, and the COMB group did a combination. Testing before and after training measured VO2max, anaerobic threshold, cardiovascular parameters, blood markers, and performance. Results showed improvements in resting
Effects of Eccentric Strength Training’s Time on Daily Plasma Testosterone Le...IOSR Journals
This study aims to evaluate the effects of the eccentric physical training’s time on daily plasma concentrations of testosterone among sedentary athletes. Sixty male athletes, with homogeneous age, size and weight were selected for the study during three months. They were subjects to a strength training of the extensor and flexor muscles of the knee. After they were divided in two groups of thirty subjects and then had physical training either in the morning between 6 and 7, or in the evening, between 16 and 17. The dosage of testosterone on each athlete was performed before and after submission to an eccentric physical program at the antecubital vein in a restful sitting. Our results have shown that eccentric physical training induces the increase of this steroid hormone in the two groups of athletes and the training in the evening promotes better its production. Our results also showed that the rate of this androgen drop significantly during the day in both groups of athletes trained in the morning or in the evening as well as their respective controls. However, the decline was even more pronounced for subjects trained in the morning
This study aimed to compare VO2max scores in wheelchair athletes using an upper-body ergometer and a new wheelchair ergometer prototype. Ten male wheelchair basketball players performed VO2max tests on both ergometers. No significant differences were found between the ergometers, though there was a trend toward higher scores on the wheelchair prototype. Data screening removed outliers due to large differences in body mass. While inconclusive, the study provided insights to improve the wheelchair ergometer prototype for better testing wheelchair athletes' aerobic fitness.
This study evaluated a new method of monitoring exercise training called the session rating of perceived exertion (RPE) method. The session RPE method uses a participant's perceived exertion after a training session as a marker of training intensity. The study compared the session RPE method to an objective heart rate (HR) monitoring method during steady state and interval cycling, as well as basketball practice. It found a consistent relationship between the two monitoring methods, though the session RPE scores were generally higher. Even with different subjects, the relationships between the methods were similar. The study concluded the session RPE method is a valid way to quantify training during various types of exercise when objective monitoring is not possible.
Familiarization, reliability, and evaluation of a multiple sprint running tes...Pablo Vicencio Ardiles
This study investigated the use of self-selected recovery periods in a multiple sprint test to reliably quantify an individual's ability to resist fatigue. Twenty active students completed 4 trials of 12 x 30m sprints with self-selected recovery between sprints. The results showed learning effects in the first 2 trials as evidenced by more subjects failing to maintain sprint performance. Reliability was good between trials 3 and 4, with a coefficient of variation of 11.1% and intraclass correlation of 0.76. Perceived exertion increased progressively throughout trials despite no change in sprint times. Aerobic fitness showed little correlation with mean recovery time.
1) A study compared the hormonal, neuromuscular, and recovery responses between forced repetition (FR) training and maximum repetition (MR) training. FR resulted in greater decreases in muscle force and activity compared to MR.
2) Several studies examined the effects of forced repetitions, finding they induce greater acute hormonal and neuromuscular responses than traditional training and may overload the neuromuscular system more, especially for strength athletes.
3) Other training techniques like tri-sets, drop sets, and rest-pause were also examined in studies and found to effectively increase metabolic and mechanical stresses through greater time under tension, workload, and muscle recruitment compared to traditional sets performed to failure.
1) A study investigated the effects of 22 weeks of periodized soccer training focused on technical-tactical ability in young players.
2) The training reduced markers of muscle damage (CK and LDH levels) over time and improved high-intensity performance and tactical metrics in games.
3) Players who saw greater reductions in muscle damage markers also had larger increases in high-intensity actions during games.
This study examined the effects of a 6-week isokinetic resistance training program on quadriceps and hamstrings peak torque and standing long jump performance in 12 untrained men. The training consisted of 3 sets of 10 repetitions at 100°/s, 3 days per week for 6 weeks. After training, quadriceps peak torque increased by an average of 10.5% but there was no significant change in hamstrings peak torque or standing long jump performance. The major finding was that gains in isokinetic strength did not translate to improvements in functional performance, likely due to the training lacking eccentric loading which is an important component of the standing long jump.
Variation in body composition in professional soccer playersFernando Farias
The present study was the first to compare
body composition according to 6 positional roles. Results
showed that in midfielders, mean body fat and mass values in
players with a central and lateral role differed substantially.
This finding is noteworthy and suggests that when mean
body composition values are assessed across teams, data
should be interpreted according to individual positional role
and not to a traditional or basic division of 4 positional
groups including goalkeepers, defenders, midfielders, and
attackers.
Body composition assessment of english premier leagueFernando Farias
The measurement of body composition is now a fun-
damental component of sport science support in elite-
level soccer. Indeed, regular assessments of body com-
position are often used to determine suitability for
competition as well as to monitor the effectiveness of
dietary and training interventions (Sutton, Scott,
Wallace, & Reilly, 2009).
This study compared measurements of muscle oxygen saturation (SmO2) from a novel wearable wireless device to a benchtop fiber-based system during exercise. 17 athletes performed an incremental cycling test while SmO2 was measured in the quadriceps muscle of both legs simultaneously using the two systems. The wearable device provided real-time estimates of lactate threshold power, which were evaluated against blood lactate measurements. The study found high correlations between SmO2 measurements from the two systems and that the wearable device estimated lactate threshold power within half an increment of the cycling test results, suggesting this novel device may provide a useful physiological indicator of exertion for athletes.
Cold water immersion alters muscle recruitment and balanceFernando Farias
The purpose of this study was to evaluate the effects of cold-water immersion on the electromyographic (EMG) response of
the lower limb and balance during unipodal jump landing. The evaluation comprised 40 individuals (20 basketball players
and 20 non-athletes). The EMG response in the lateral gastrocnemius, tibialis anterior, fibular longus, rectus femoris,
hamstring and gluteus medius; amplitude and mean speed of the centre of pressure, flight time and ground reaction force
(GRF) were analysed. All volunteers remained for 20 min with their ankle immersed in cold-water, and were re-evaluated
immediately post and after 10, 20 and 30 min of reheating
DISTRIBUTION OF FIGHT TIME AND BREAK TIME IN INTERNATIONAL SILAT COMPETITIONNizam Shapie
Silat is a traditional martial art of that has evolved in Indonesia, Malaysia and Brunei Darussalam. Silat has evolved into a formal martial art that is now officially included in the South East Asia Games.
Performance analysis has been used as a research tool to investigate various aspects of different combat sports. In professional boxing, Hughes and Franks (2004) described a system for analysis of punch types used. Other combat sports where performance analysis has investigated the action of competitors include Taekwondo (Wojtaś et al., 2007) and mixed martial arts (Williams and O’Donoghue, 2006).
Time-motion analysis is an objective observational analysis technique used to investigate work-rate in sport and exercise (O’Donoghue, 2008). The simplest computerized analysis system records periods of work and rest perceived by the observer (O’Donoghue et al., 2005a).
There is little work on work-rate in martial arts, especially Silat. The purpose of this investigation was to identify periods of fight time and break time within rounds of international Silat contests.
VO2max (maximal oxygen consumption) refers to the amount of oxygen that can be consumed within 1 minute – this value has been called the absolute VO2max and this parameter is one of the highest in rowers among other sport disciplines.
High intensity warm ups elicit superior performance Fernando Farias
The benefits of an active warm-up (WU) have been
attributed to increases in muscle temperature, nerve
conductivity, and the speeding of metabolic reactions.1 Non-
temperature-related benefifis include an increased blood-flflw
to working muscles, elevated baseline oxygen consumption,
and the induction of a post-activation potentiation (PAP)
effect.
Body composition of english premier league soccer playersFernando Farias
Body composition is a key consideration in the physical make-up of professional soccer players. The aims of the present
study were to determine whether the body composition of professional soccer players varied according to playing position,
international status or ethnicity, and to establish which variables best distinguished the soccer players from a reference group.
Body composition was assessed using dual-energy X-ray absorptiometry in 64 male professional soccer players
The purpose of this investigation is comparing the effects of three admitting models using maximum admits in increasing the maximum strength and hypertrophy of unexercised men in the muscles of arm forth. Statistical sample of this investigation are 45 non-athlete male students of Mazandaran University of Science and Technology of the Department of Public Physical Education. Maximum strength and the mass of muscles in the sample was measured using the maximum repeating test in moving arm form by Haler or measured using the arm, before and after the match. Then, the samples were grouped in 3 empirical groups (15 per groups). They exercised for 8 weeks, 3 sessions per week, and 75 minutes per session. The data were analyzed by variance and (LSD) by using SPSS20 software (p≤0.05). There was no meaningful difference among 3 models; normally pyramidal, Counter-pyramidal, and Flat-pyramidal in increasing the shape of arm forth. Also, there was a meaningful difference between two methods, pyramids and flat pyramid after the test. There was no meaningful difference among the methods between counter-pyramidal and flat-pyramidal. So, we can suggest that when the purpose is increasing the muscle, we can use every method, but if the purpose is increasing the strength, it is preferring to use flat pyramidal method.
Short inter-set rest blunts resistance exercise-inducedFernando Farias
Manipulating the rest-recovery interval between sets of resistance exercise may influence
training-induced muscle remodelling. The aim of this study was to determine the acute muscle
anabolic response to resistance exercise performed with short or long inter-set rest intervals.
In a study with a parallel-group design, 16 males completed four sets of bilateral leg-press and
knee-extension exercise at 75% of one-repetition maximum to momentary muscular failure,
followed by ingestion of 25 g of whey protein. Resistance exercise sets were interspersed by
1 min (n = 8) or 5 min of passive rest (n = 8). Muscle biopsies were obtained at rest, 0, 4, 24
and 28 h postexercise during a primed continuous infusion of l-[ring-13C6]phenylalanine to
determine myofibrillar protein synthesis and intracellular signalling.
Eccentric training can improve muscle strength, power, and stretch-shortening cycle function to a greater extent than concentric or traditional resistance training. While both eccentric and concentric training increase muscle strength, the increases tend to be mode-specific. Eccentric training with loads greater than concentric strength limits elicits greater overall strength gains. Faster contraction velocities during eccentric training may further enhance strength and power adaptations. Eccentric training appears especially effective for improving performance requiring stretch-shortening cycle function.
THE STEADY-STATE MODEL OF
BIOENERGETICS FAILS TO ACCU-
RATELY DESCRIBE THE METABO-
LISM FOR HIGH-INTENSITY POWER.
THIS ARTICLE REEXAMINES THE
ROLE OF PHOSPHOCREATINE,
LACTATE PRODUCTION, AND THE
IMPORTANCE OF AEROBIC METAB-
OLISM DURING SHORT-TERM HIGH-
INTENSITY POWER PERFORMANCE.
METABOLIC AND MECHANICAL
TESTS OF HIGH-INTENSITY POWER
HAVE EVOLVED IN THE PAST 40
YEARS. THE AUTHORS COMPARED
THE MAXIMAL ACCUMULATED
OXYGEN-DEFICIT MODEL VERSUS
THE CRITICAL POWER MODEL AND
SUMMARIZED THE RECENTLY
DEVELOPED 3-MINUTE ALL-OUT
EXERCISE TEST (3 MT). THE 3 MT
OFFERS THE STRENGTH AND
CONDITIONING PROFESSIONAL A
SIMPLE METHOD OF ESTIMATING
AN ATHLETE’S TOLERANCE TO
HIGH-INTENSITY POWER EXERCISE.
State of the Science of Military Human Performance OptimizationJA Larson
The document summarizes research on optimizing human performance in the military. It finds that combining upper and lower body resistance training with aerobic training and load carriage exercise is the most effective training method for improving load carriage performance, based on a meta-analysis. Additionally, limiting long distance running can significantly reduce musculoskeletal injuries without negatively impacting performance. Standardized physical training programs are also shown to be more effective and safer than traditional training methods.
The effects of muscle action, repetition duration, and loadingHumberto Gomes
1) The study examined the effects of 3 different 10-week resistance training programs (eccentric-only, repetition duration-accentuated eccentric, and traditional) on muscular performance and body composition in 59 trained males and females.
2) Testing before and after training included measures of muscular endurance, strength, and body composition. The training programs were matched for effort but varied the muscle actions, repetition durations, and loading strategies.
3) The results found no significant differences between groups for changes in muscular performance or body composition, except the traditional group saw greater improvements in arm muscular endurance compared to the eccentric-only groups. Effect sizes for muscular performance changes were moderate to large for all groups.
A Comparative Study of VO2 Max in Young Female Athletes and Non-AthletesIOSR Journals
Abstract:
Aims And Objectives: The purpose of this study was to compare maximum oxygen uptake(VO2
max ) between young female athletes and non-athletes and to show the importance of sports for physical
fitness.
Material & Methods: The present study was carried out in 50 females between the age group of 18-22 yrs.
They were divided into to groups, study group (25 athletes) and control group. (25 non-athletes) The maximum
oxygen uptake (VO2 max) was compared between cases and controls by using Queen’ college step test.(
Harward step test) .
Results: The VO2 max was higher in female athletes than non-athletes.
Conclusion: The present study showed VO2 max levels more in female athletes. Now a days, physical inactivity
is seen among students due to sedentary lifestyle which may lead to many health problems. Hence, we suggest
that students should get involved in sports and it should make a compulsory subject in colleges.
Key words:- VO2 Max; athlete & non athlete ;Young females
This study examined the relationship between cycling economy, measured as oxygen consumption (VO2), and simultaneous measurements of 3D kinematics and electromyography in trained cyclists. A multiple regression analysis showed that peak knee extension velocity and mean activity of the rectus femoris muscle were significant predictors of VO2 during steady state cycling. This was the first study to relate cycling economy to 3D kinematic and electromyography measurements, providing insight into optimizing biomechanical parameters to improve cycling performance.
This study examined the relationship between caffeine consumption before Super Rugby games and post-game sleep in 20 elite rugby players. Players wore activity monitors to measure sleep for 3 days before, after, and the night of an evening game. Players consumed caffeine as normal before and during games. Caffeine levels in saliva were higher after games than before in most players. This was associated with a 3.5 hour delay in falling asleep and 1.5 fewer hours of sleep after games. The findings suggest that caffeine before Super Rugby games can negatively impact post-game sleep quality and duration.
USS Auk (AM-38) was an Lapwing-class minesweeper acquired by the U.S. Navy after World War I for the task of removing mines that had been placed during the war.
Variation in body composition in professional soccer playersFernando Farias
The present study was the first to compare
body composition according to 6 positional roles. Results
showed that in midfielders, mean body fat and mass values in
players with a central and lateral role differed substantially.
This finding is noteworthy and suggests that when mean
body composition values are assessed across teams, data
should be interpreted according to individual positional role
and not to a traditional or basic division of 4 positional
groups including goalkeepers, defenders, midfielders, and
attackers.
Body composition assessment of english premier leagueFernando Farias
The measurement of body composition is now a fun-
damental component of sport science support in elite-
level soccer. Indeed, regular assessments of body com-
position are often used to determine suitability for
competition as well as to monitor the effectiveness of
dietary and training interventions (Sutton, Scott,
Wallace, & Reilly, 2009).
This study compared measurements of muscle oxygen saturation (SmO2) from a novel wearable wireless device to a benchtop fiber-based system during exercise. 17 athletes performed an incremental cycling test while SmO2 was measured in the quadriceps muscle of both legs simultaneously using the two systems. The wearable device provided real-time estimates of lactate threshold power, which were evaluated against blood lactate measurements. The study found high correlations between SmO2 measurements from the two systems and that the wearable device estimated lactate threshold power within half an increment of the cycling test results, suggesting this novel device may provide a useful physiological indicator of exertion for athletes.
Cold water immersion alters muscle recruitment and balanceFernando Farias
The purpose of this study was to evaluate the effects of cold-water immersion on the electromyographic (EMG) response of
the lower limb and balance during unipodal jump landing. The evaluation comprised 40 individuals (20 basketball players
and 20 non-athletes). The EMG response in the lateral gastrocnemius, tibialis anterior, fibular longus, rectus femoris,
hamstring and gluteus medius; amplitude and mean speed of the centre of pressure, flight time and ground reaction force
(GRF) were analysed. All volunteers remained for 20 min with their ankle immersed in cold-water, and were re-evaluated
immediately post and after 10, 20 and 30 min of reheating
DISTRIBUTION OF FIGHT TIME AND BREAK TIME IN INTERNATIONAL SILAT COMPETITIONNizam Shapie
Silat is a traditional martial art of that has evolved in Indonesia, Malaysia and Brunei Darussalam. Silat has evolved into a formal martial art that is now officially included in the South East Asia Games.
Performance analysis has been used as a research tool to investigate various aspects of different combat sports. In professional boxing, Hughes and Franks (2004) described a system for analysis of punch types used. Other combat sports where performance analysis has investigated the action of competitors include Taekwondo (Wojtaś et al., 2007) and mixed martial arts (Williams and O’Donoghue, 2006).
Time-motion analysis is an objective observational analysis technique used to investigate work-rate in sport and exercise (O’Donoghue, 2008). The simplest computerized analysis system records periods of work and rest perceived by the observer (O’Donoghue et al., 2005a).
There is little work on work-rate in martial arts, especially Silat. The purpose of this investigation was to identify periods of fight time and break time within rounds of international Silat contests.
VO2max (maximal oxygen consumption) refers to the amount of oxygen that can be consumed within 1 minute – this value has been called the absolute VO2max and this parameter is one of the highest in rowers among other sport disciplines.
High intensity warm ups elicit superior performance Fernando Farias
The benefits of an active warm-up (WU) have been
attributed to increases in muscle temperature, nerve
conductivity, and the speeding of metabolic reactions.1 Non-
temperature-related benefifis include an increased blood-flflw
to working muscles, elevated baseline oxygen consumption,
and the induction of a post-activation potentiation (PAP)
effect.
Body composition of english premier league soccer playersFernando Farias
Body composition is a key consideration in the physical make-up of professional soccer players. The aims of the present
study were to determine whether the body composition of professional soccer players varied according to playing position,
international status or ethnicity, and to establish which variables best distinguished the soccer players from a reference group.
Body composition was assessed using dual-energy X-ray absorptiometry in 64 male professional soccer players
The purpose of this investigation is comparing the effects of three admitting models using maximum admits in increasing the maximum strength and hypertrophy of unexercised men in the muscles of arm forth. Statistical sample of this investigation are 45 non-athlete male students of Mazandaran University of Science and Technology of the Department of Public Physical Education. Maximum strength and the mass of muscles in the sample was measured using the maximum repeating test in moving arm form by Haler or measured using the arm, before and after the match. Then, the samples were grouped in 3 empirical groups (15 per groups). They exercised for 8 weeks, 3 sessions per week, and 75 minutes per session. The data were analyzed by variance and (LSD) by using SPSS20 software (p≤0.05). There was no meaningful difference among 3 models; normally pyramidal, Counter-pyramidal, and Flat-pyramidal in increasing the shape of arm forth. Also, there was a meaningful difference between two methods, pyramids and flat pyramid after the test. There was no meaningful difference among the methods between counter-pyramidal and flat-pyramidal. So, we can suggest that when the purpose is increasing the muscle, we can use every method, but if the purpose is increasing the strength, it is preferring to use flat pyramidal method.
Short inter-set rest blunts resistance exercise-inducedFernando Farias
Manipulating the rest-recovery interval between sets of resistance exercise may influence
training-induced muscle remodelling. The aim of this study was to determine the acute muscle
anabolic response to resistance exercise performed with short or long inter-set rest intervals.
In a study with a parallel-group design, 16 males completed four sets of bilateral leg-press and
knee-extension exercise at 75% of one-repetition maximum to momentary muscular failure,
followed by ingestion of 25 g of whey protein. Resistance exercise sets were interspersed by
1 min (n = 8) or 5 min of passive rest (n = 8). Muscle biopsies were obtained at rest, 0, 4, 24
and 28 h postexercise during a primed continuous infusion of l-[ring-13C6]phenylalanine to
determine myofibrillar protein synthesis and intracellular signalling.
Eccentric training can improve muscle strength, power, and stretch-shortening cycle function to a greater extent than concentric or traditional resistance training. While both eccentric and concentric training increase muscle strength, the increases tend to be mode-specific. Eccentric training with loads greater than concentric strength limits elicits greater overall strength gains. Faster contraction velocities during eccentric training may further enhance strength and power adaptations. Eccentric training appears especially effective for improving performance requiring stretch-shortening cycle function.
THE STEADY-STATE MODEL OF
BIOENERGETICS FAILS TO ACCU-
RATELY DESCRIBE THE METABO-
LISM FOR HIGH-INTENSITY POWER.
THIS ARTICLE REEXAMINES THE
ROLE OF PHOSPHOCREATINE,
LACTATE PRODUCTION, AND THE
IMPORTANCE OF AEROBIC METAB-
OLISM DURING SHORT-TERM HIGH-
INTENSITY POWER PERFORMANCE.
METABOLIC AND MECHANICAL
TESTS OF HIGH-INTENSITY POWER
HAVE EVOLVED IN THE PAST 40
YEARS. THE AUTHORS COMPARED
THE MAXIMAL ACCUMULATED
OXYGEN-DEFICIT MODEL VERSUS
THE CRITICAL POWER MODEL AND
SUMMARIZED THE RECENTLY
DEVELOPED 3-MINUTE ALL-OUT
EXERCISE TEST (3 MT). THE 3 MT
OFFERS THE STRENGTH AND
CONDITIONING PROFESSIONAL A
SIMPLE METHOD OF ESTIMATING
AN ATHLETE’S TOLERANCE TO
HIGH-INTENSITY POWER EXERCISE.
State of the Science of Military Human Performance OptimizationJA Larson
The document summarizes research on optimizing human performance in the military. It finds that combining upper and lower body resistance training with aerobic training and load carriage exercise is the most effective training method for improving load carriage performance, based on a meta-analysis. Additionally, limiting long distance running can significantly reduce musculoskeletal injuries without negatively impacting performance. Standardized physical training programs are also shown to be more effective and safer than traditional training methods.
The effects of muscle action, repetition duration, and loadingHumberto Gomes
1) The study examined the effects of 3 different 10-week resistance training programs (eccentric-only, repetition duration-accentuated eccentric, and traditional) on muscular performance and body composition in 59 trained males and females.
2) Testing before and after training included measures of muscular endurance, strength, and body composition. The training programs were matched for effort but varied the muscle actions, repetition durations, and loading strategies.
3) The results found no significant differences between groups for changes in muscular performance or body composition, except the traditional group saw greater improvements in arm muscular endurance compared to the eccentric-only groups. Effect sizes for muscular performance changes were moderate to large for all groups.
A Comparative Study of VO2 Max in Young Female Athletes and Non-AthletesIOSR Journals
Abstract:
Aims And Objectives: The purpose of this study was to compare maximum oxygen uptake(VO2
max ) between young female athletes and non-athletes and to show the importance of sports for physical
fitness.
Material & Methods: The present study was carried out in 50 females between the age group of 18-22 yrs.
They were divided into to groups, study group (25 athletes) and control group. (25 non-athletes) The maximum
oxygen uptake (VO2 max) was compared between cases and controls by using Queen’ college step test.(
Harward step test) .
Results: The VO2 max was higher in female athletes than non-athletes.
Conclusion: The present study showed VO2 max levels more in female athletes. Now a days, physical inactivity
is seen among students due to sedentary lifestyle which may lead to many health problems. Hence, we suggest
that students should get involved in sports and it should make a compulsory subject in colleges.
Key words:- VO2 Max; athlete & non athlete ;Young females
This study examined the relationship between cycling economy, measured as oxygen consumption (VO2), and simultaneous measurements of 3D kinematics and electromyography in trained cyclists. A multiple regression analysis showed that peak knee extension velocity and mean activity of the rectus femoris muscle were significant predictors of VO2 during steady state cycling. This was the first study to relate cycling economy to 3D kinematic and electromyography measurements, providing insight into optimizing biomechanical parameters to improve cycling performance.
This study examined the relationship between caffeine consumption before Super Rugby games and post-game sleep in 20 elite rugby players. Players wore activity monitors to measure sleep for 3 days before, after, and the night of an evening game. Players consumed caffeine as normal before and during games. Caffeine levels in saliva were higher after games than before in most players. This was associated with a 3.5 hour delay in falling asleep and 1.5 fewer hours of sleep after games. The findings suggest that caffeine before Super Rugby games can negatively impact post-game sleep quality and duration.
USS Auk (AM-38) was an Lapwing-class minesweeper acquired by the U.S. Navy after World War I for the task of removing mines that had been placed during the war.
This study aimed to determine if the running-based anaerobic sprint test (RAST) could predict anaerobic capacity as measured by maximum accumulated oxygen deficit (MAOD) in 11 male middle-distance runners. The runners completed a graded exercise test to determine VO2 max and intensity at VO2 max. They also performed submaximal and supramaximal running tests to calculate MAOD. On a separate day, they performed the RAST, involving 6 short sprint runs. None of the variables from the RAST (peak power, mean power, fatigue index, maximal or mean velocity) were significantly correlated with MAOD. The findings indicate that the RAST does not predict anaerobic capacity in running athletes as measured
This systematic review examined 49 studies on the effects of foam rolling (FR) on performance and recovery. Regarding performance, FR appears to be an effective warm-up tool to increase flexibility, but should be used in combination with dynamic stretching and active warm-up. The optimal duration to improve flexibility is 90-120 seconds of FR. Regarding recovery, FR may reduce delayed onset muscle soreness (DOMS) and muscle pain after exercise. FR also seems to enhance recovery when used after exercise, improving symptoms of post-exercise muscle pain. Dosages of 3-5 sets of 30-60 seconds of FR with 10-30 second rest periods appear optimal for recovery and performance benefits.
The document presents the second edition of the "PMR Buzz" which provides abstract summaries from current rehabilitation medicine journals, and includes contributions from several rehabilitation experts. It contains a systematic review and meta-analysis comparing the effectiveness of autologous blood products and steroid injections for plantar fasciitis, and a randomized controlled trial comparing the effects of balance training and aerobic training for patients with degenerative cerebellar disease. The document aims to disseminate practice-changing research and receive feedback to improve the quality of information presented in future editions.
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1. The study examined the effects of a walking intervention on depressive feelings and social adaptation in healthy workers.
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3. The results suggest that regular walking may have benefits for mental health and social functioning in healthy individuals.
This document discusses sarcopenia, which is the loss of skeletal muscle mass and strength associated with aging. It provides definitions of sarcopenia from leading medical organizations. Tools for assessing sarcopenia include questionnaires to screen for low muscle quantity and quality, strength tests like grip strength and chair rises, and physical performance tests such as gait speed and short physical performance battery. Cut-off scores for diagnosing low muscle mass, strength, and physical performance are presented. The document also reviews epidemiology of sarcopenia and discusses approaches for detecting and diagnosing the condition.
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High-load (over 60% of 1RM) and low-load (under 60% of 1RM) resistance training protocols were compared in terms of strength and hypertrophy adaptations. A meta-analysis of 21 studies found that gains in maximum strength were significantly greater with high-load training, while increases in muscle size were similar between high-load and low-load training. The findings indicate that maximum strength benefits most from heavy loads, but muscle hypertrophy can be achieved equally across a range of loading intensities.
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Post exercise cold water immersion attenuates acute anabolic signallingFernando Farias
these two studies offer new and
important insights into how cold water immersion during
recovery from strength exercise affects chronic training
adaptations and some of the molecular mechanisms that
underpin such adaptations. Cold water immersion delayed
or inhibited satellite cell activity and suppressed the
activation of p70S6K after acute strength exercise. These
effects may have been compounded over time to diminish
the expected increases in muscle mass and strength as a
result of training. The results of these studies challenge the
notion that cold water immersion improves recovery after
exercise. Individuals who use strength training to improve
athletic performance, recover from injury or maintain
their health should therefore reconsider whether to use
cold water immersion as an adjuvant to their training.
This document discusses VO2max, which is a measurement of the maximum amount of oxygen the body can use during exercise. It defines VO2max and explains that it is the best indicator of cardiovascular endurance. The document outlines normal VO2max values and discusses factors that can affect VO2max levels, such as gender, training, aging, altitude, and smoking. It also describes methods used to measure VO2max both directly and indirectly.
This document discusses factors that affect endurance performance. It states that maximal oxygen uptake (VO2 max) has traditionally been considered the most important factor, but lactate threshold and exercise economy also contribute. Strength training can improve exercise economy without compromising endurance. During and after prolonged exercise, fatigue increases, but postactivation potentiation may enhance performance by decreasing fatigue or extending the point of fatigue. This study examined how fatigue affects strength and power in endurance athletes before, during, and after a running protocol to test if they can maintain performance levels while fatigued and if potentiation could counteract fatigue.
An oral paper presentation on the topic "Cardiorespiratory fitness: A cross-sectional study by comparison of the athletic and non-athletic medical UG students using VO2 max" based on the post graduate dissertation done in 2019-2021
Lactate removal in water jss&m (07)[1] meu artigofmasi
The document compares blood lactate removal during active recovery performed through cycling in water immersion versus cycling on land after a similar exercise bout. Eleven male subjects exercised on a treadmill and then recovered via cycling, with one group cycling in water and the other on land. Blood lactate levels were measured at various time points during recovery. Blood lactate levels were significantly lower during water immersion cycling compared to land cycling at the 6-minute and 15-minute time points, indicating that active recovery in water is more effective for removing blood lactate after exercise.
Similar to Je ponline april2012kaminagakura_zagatto (20)
1. 90
Journal of Exercise Physiologyonline
Volume 15 Number 2 April 2012
Editor-in-Chief
Editor-in-Chief JEPonline
Tommy Boone, PhD, MBA
Tommy Boone, PhD, MBA
Review Board
Review Board
Todd Astorino, PhD
Todd Astorino, PhD
Can the Running-Based Anaerobic Sprint Test
Julien Baker, PhD
Julien Baker, PhD be used to Predict Anaerobic Capacity?
Steve Brock, PhD
Steve Brock, PhD
Lance Dalleck, PhD
Lance Dalleck, PhD
Eric Goulet, PhD Edson I. Kaminagakura1, Alessandro M. Zagatto2 ,Paulo
Eric Goulet, PhD
Robert Gotshall, PhD E.Redkva 1, Elton B. Gomes1, João P. Loures1, Carlos A. Kalva-
Robert Gotshall, PhD
Alexander Hutchison, PhD
Alexander Hutchison, PhD Filho 1, Marcelo Papoti3.
M. Knight-Maloney, PhD
M. Knight-Maloney, PhD
Len Kravitz, PhD
Len Kravitz, PhD 1
Laboratório de Avaliação Física Saúde e Esporte (LAFISE),
James Laskin, PhD
James Laskin, PhD
Yit Aun Lim, PhD
Universidade Estadual de Ponta Grossa, Ponta Grossa, PR,
Yit Aun Lim, PhD
Lonnie Lowery, PhD Brasil; 2Laboratório de Pesquisa em Fisiologia do Exercício,
Lonnie Lowery, PhD
Derek Marks, PhD
Derek Marks, PhD Universidade Federal de Mato Grosso do Sul, Campo Grande,
Cristine Mermier, PhD
Cristine Mermier, PhD MS, Brasil; Departamento de Educação Física, Universidade
Robert Robergs, PhD
Robert Robergs, PhD Estadual de São Paulo, Presidente Prudente, SP, Brasil.
Chantal Vella, PhD
Chantal Vella, PhD
Dale Wagner, PhD
Dale Wagner, PhD
Frank Wyatt, PhD ABSTRACT
Frank Wyatt, PhD
Ben Zhou, PhD
Ben Zhou, PhD
Kaminagakura EI, Zagatto AM, Redkva PE, Gomes EB,
Loures JP, Kalva-Filho CA, Franco VH, Papoti M. Can
Official Research Journal of the
American Society of Exercise
Running-Based Anaerobic Sprint Test be used to Predict
Physiologists Anaerobic Capacity? JEPonline 2012;15(2):90-99. The purpose
Official Research Journal
of the American Society of of this study was to determine if the use of the running-based
ISSN 1097-9751
Exercise Physiologists anaerobic sprint test (RAST) could be used to predict anaerobic
capacity in running athletes. Eleven male middle-distance runners
ISSN 1097-9751 (21 ± 1 yrs) volunteered to take part in this study. The maximum
accumulated oxygen deficit (MAOD) was determined during
running on a treadmill, and the RAST was determined during
running on a track. None of the variables associated with RAST
output (peak power, mean power, fatigue index, and maximal and
mean velocities) was significantly correlated with MAOD. Thus,
the findings indicate that the use of the RAST does not predict
anaerobic capacity in running.
Key Words: Anaerobic Capacity, Running, RAST, MAOD
2. 91
INTRODUCTION
Anaerobic capacity is defined as the maximum amount of adenosine triphosphate that can be
resynthesized via anaerobic metabolism (both alactic and lactic systems) during maximal exercise
(10,22). Currently, the maximum accumulated oxygen deficit (MAOD) is considered the gold standard
to estimate anaerobic capacity (15). In addition to being sensitive to anaerobic training (28,29),
MAOD is correlated with performance in high intensity efforts (32) and it is used to validate other
methods that evaluate anaerobic conditioning (3,7,23,38).
To use MAOD to estimate anaerobic capacity is not easy. It requires several submaximal exercise
bouts and one supramaximal exercise bout (19). It is also difficult to use MAOD during the periodized
training routine. Furthermore, it is necessary to measure the oxygen uptake (VO 2) during the exercise
bouts, which makes the methodological use of MAOD a high financial cost. As a result of these
factors, it is important to identify easier application at a lower cost. This would enable the widespread
use of the procedures in the evaluation and monitoring of sports training.
For example, the Wingate test (WanT) (2,26), jump tests (15), attained running (39), and the maximal
anaerobic running test (MART)(26) are inexpensive and commonly used. These methodologies have
been studied for a considerable period of time, and they have been applied in the evaluation of
anaerobic power of athletes (18,25,38), healthy subjects (13,35), and cardiac patients (21).
Several studies have demonstrated a relationship between the parameters measured from WanT and
anaerobic capacity (22,37). Scott et al. (32) found significant correlations between peak power (PP)
from WanT and MAOD determined on a treadmill. Minahan et al. (22) showed that the mean power
(MP) and fatigue index (FI) from WanT were correlated with MAOD. Green et al. (1993) reported that
the mean power, peak lactate and/or fatigue index can estimate the activity of the glycolytic system
and represent rate of anaerobic capacity. Despite the use of these parameters to estimate anaerobic
capacity, there is still disagreement as their true value (22).
Moreover, although the WanT is a rapid (30 sec) test that is easy to apply and at relatively low cost, it
is usually performed on a cycle ergometer and therefore is not appropriate for running sports (16). On
the other hand, the running-based anaerobic sprint test (RAST), which is adaptation of the WAnT to
running (40), has been widely used to assess anaerobic fitness. The RAST output (i.e., peak, power,
mean power, fatigue index, maximal speed, and mean speed) are similar to those determined in
WAnT, showing high correlations with the same variables (40). Zagatto et al. (37) showed that the
RAST is a reproducible and valid procedure for assessing anaerobic power. It is acknowledged as a
good predictor of running performance (35 to 400 m), which can be easily added to be training
routine. Additionally, this methodology is used to evaluate athletes in many sports such as soccer (1),
basketball (4), and handball (30).
However, despite the easy, specificity, and low costs involved in applying the RAST, additional
analysis is needed. The purpose of this study was to determine if the use of the running anaerobic
sprint test (RAST) could be used to predict anaerobic capacity in running athletes.
METHODS
Subjects
The sample size was calculated based on the assumption that MAOD hold significant and strong
correlation coefficients higher than 0.80 with other anaerobic parameters (3). G*Power 3.1 software
(Düsseldorf, Germany) was used to determine that a sample size of nine subjects was the minimum
3. 92
needed to provide a statistical power of 90% with an alpha of 0.05 for statistical significance. Eleven
runners volunteered (21 ± 0.7 yrs, 66.3 ± 1.2 kg of body weight and 171.0 ± 1.0 cm in height) from the
Brazilian army. The subjects were middle distance runners with a background in 800 m to 5000 m.
They trained five weekly sessions lasting 120 min at an average volume of 60 km · week-1. All
subjects were informed of the risks and benefits and gave written consent regarding the experimental
procedures. All procedures were conducted according to the declaration of Helsinki.
Procedures
The experimental procedures were applied during a 7-d period, separated by a minimal interval of 24
hrs. During the tests, the subjects were released from military activities, including training, and were
instructed not to perform strenuous exercise prior assessments. They were also asked not to
consume alcohol, caffeine, and tobacco during the period of participation in the study.
During the 1st day, the subjects underwent a graded exercise test (GXT) to determine maximal
oxygen consumption (VO 2 max) and the intensity associated at VO 2 max (iVO2 max). During the 2nd
to the 6th-day, the subjects underwent four submaximal efforts (50, 60, 70, and 80% of iVO2 max).
The efforts were performed randomly followed by a supra-maximal effort (120% of iVO2 max) for
determination of MAOD. On the 7th day, the subjects engaged in the RAST on an official running
track. The GXT, submaximal, and maximal exercises were used to determine MAOD; all were
performed on a motorized treadmill (ATL Inbramed, Inbrasport, Porto Alegre, Brazil) with the slope
fixed at 1% (16). Five minutes of moderate intensity exercise was used as warm-up, with the test
beginning after 5 min of passive recovery.
During each of the laboratory tests, GXT, submaximal, and maximal exercises, VO2 was measured
breath-by-breath using a True-One 2400 gas analyzer (ParvoMedics, EastSandy, Utah, USA). The
gas analyzers were calibrated immediately before and verified after each test using a certified
gravimetrically determined gas mixture, while the ventilometer was calibrated pre-exercise and
verified post-exercise using a three liter syringe in accordance with the manufacturer’s instructions.
Following removal of outliers to exclude discrepant breaths, breath-by-breath VO 2 data were
interpolated to give 1-sec values and, then, smoothed using rolling 30-sec averages (OriginPro 8.0,
OriginLab Corporation, Microcal, Massachusetts, USA) to enhance the underlying VO 2 response
characteristics. In every test, the start and the end-time of each run (i.e., exercise stage) was
recorded for later synchronization between ventilatory data and running events
GXT to Determine VO2 max and Intensity Associated to VO2 max (iVO 2 max)
The maximal oxygen uptake (VO 2 max) and velocity associated with VO 2 max (iVO 2 max) were
estimated in a maximal GXT beginning at 12 km · h-1 and increased by 1 km · h-1 every 3 min until
voluntary exhaustion. The treadmill grade was fixed at 1%. Maximum oxygen consumption was
considered as the highest VO2 average achieved during the last 30 secs of each stage, when at least
two of the three following criteria were obtained: (a) blood lactate concentration greater than 8 mM;
(b) heart rate greater than 90% of maximum predicted age (220 – age); and (c) a respiratory
exchange ratio of 1.1 or greater. The velocity associated with VO 2 max (iVO2 max) was considered
the lowest velocity at which VO 2 max was achieved.
Determination of the Maximum Accumulated Oxygen Deficit (MAOD)
The subjects performed four 7-min submaximal running bouts corresponding to 50, 60, 70, and 80%
iVO2 max. Oxygen consumption was measured throughout each 7-min exercise period as previously
described, and VO2 during the last 1-min of each bout was averaged and used as the steady-state
VO2 for the corresponding velocity. After the submaximal intensity exercise sessions (i.e., 5 min of
4. 93
passive recovery), a 120% iVO2 max supramaximal exercise was performed to measure time to
exhaustion and VO2.
A linear regression line was fitted through a fixed y-intercept 5.1 mL · kg-1 · min-1 (for more details see
Medbo et al., 19), and four submaximal intensities and their respective steady-state VO2 values. This
regression line was extrapolated and the oxygen demand corresponding to 120% iVO2 max was
estimated. Therefore, MAOD was calculated as the difference between estimated VO 2 demand area
(estimated VO2 demand multiplied by time to exhaustion) and VO 2 integrated over time in the
maximal exercise.
Running Anaerobic Sprint Test (RAST)
Total body mass of the subjects was determined using a digital scale (Tanita UM080, Brazil),
including clothing used during testing. The running anaerobic sprint test (RAST) consisted of six 35 m
maximal runs separated by a period of 10 secs of passive recovery. The record time was conducted
every effort by a photocell system (CEFISE, Brazil) located at the beginning and at the end of the
route. Power (Pabs) was determined for each run by measuring the time (t), distance (D), and total
body mass (TBM) of the subject (Pabs (W) = (TMCxD2) / t3).
The running anaerobic sprint test (RAST) variables were peak power (PP), mean (MP) both
presented in units relative to body mass (rel) and absolute (abs) values, and also the fatigue index
(FI) (FI (%) = (PP – minimal power) x 100) / PP). Furthermore, given the relationship between
distance and time, effort was determined as maximum velocity (Vmax) and mean velocity (Vmean).
Statistical Analyses
The normality and homogeneity of the variables were tested and confirmed by the Shapiro-Wilk and
Levene tests, respectively. The correlations between parameters from the RAST and MAOD were
analyzed by means of the product-moment correlation test using a significance level of 5% (P<0.05)
(Statistical Package STATISTICA 7, Statsoft, USA). For the analysis of correlation coefficients (r), in
addition to the significance level (P<0.05), the correlation coefficients were classified the very weak to
negligible (0.0 to 0.2), weak (0.2 to 0.4), moderate (0.4 to 0.7), strong (0.7 to 0.9), and very strong
(0.9 to 1.0) (30).
RESULTS
Maximum oxygen consumption (VO2 max) and iVO2 max measured during the GXT corresponded to
57.5 ± 4.3 mL · kg-1 · min-1 and 15.9 ± 1.0 km · h-1, respectively. The coefficient of regression (R2)
obtained from the linear VO 2-intensity regression using submaximal values was 0.95 ± 0.04
(range 0.86 to 1.0), and the time to exhaustion at 120% of iVO2 max was 200.5 ± 44.3 secs. Thus, it
was possible to determine the MAOD value that is shown in the Table 1. The RAST values also are
shown in the Table 1. No significant correlations were found among the MAOD value and RAST
parameters. The correlation coefficients are presented in the Table 2.
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Table 2. Values (Mean ± SD and Range) of MAOD and RAST Parameters.
MEAN SD Maximal Minimal
MAOD (L) 3.6 1.5 6.5 1.7
MAOD (mL · kg-1) 54.4 22.4 98.4 26.1
PP (W) 598.6 119.4 825.2 438.1
-1
PPrel (mL · kg ) 9.0 1.7 12.5 7.0
MP (W) 451.3 119.2 701.5 319.2
-1
MPrel (mL · kg ) 6.8 1.8 10.6 5.0
FI (%) 40.5 9.4 55.6 26.7
-1
Vmax (m · s ) 6.8 0.4 7.6 6.3
-1
Vm (m · s ) 6.1 0.5 7.2 5.6
MAOD = maximal accumulated oxygen deficit; PPrel = peak Power relative to body mass; MPrel =
Mean Power relative to body mass; PP = peak power; MP = Mean power; FI= fatigue index; Vmax =
Maximal velocity; Vmean = mean velocity.
Table 2. Correlation Coefficients between the MAOD Values and RAST Parameters.
MAOD (L) MAOD (mL · kg-1)
r P r P
PP (W) 0.45 0.13 0.42 0.15
PP (W · kg-1) 0.41 0.16 0.41 0.17
MP (W) 0.29 0.34 0.26 0.39
MP (W · kg-1) 0.26 0.39 0.25 0.40
FI (%) 0.15 0.64 0.14 0.66
Vmax (m · s-1) 0.41 0.16 0.41 0.17
Vmean (m · s-1) 0.23 0.46 0.22 0.47
PPrel = peak Power relative to body mass; MPrel = Mean Power relative to body mass; PP = peak
power; MP = Mean power; FI = fatigue index; Vmax = Maximal velocity; Vmean = mean velocity.
DISCUSSION
The main findings of this study were the weak and non-significant correlations between the RAST and
MAOD, including the mean power and fatigue index, which are associated with indices of anaerobic
capacity (9,22).
The results of this study indicate that RAST cannot be used to predict anaerobic capacity, which is in
contrast to that observed in cycle ergometer (4). Moreover, Minahan et al. (22) reported using the
cycle ergometer when WAnT showed that the MP had significant correlations with MAOD (i.e., when
these parameters were shown in absolute values, r = 0.65). Furthermore, the FI demonstrated
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correlations with MAOD both in absolute (r = -0.60) and lean mass on the active (r = -0.71). Yet,
Minahan et al. (22) suggest that power does not indicate capacity and, if the WAnT is used to
estimate the anaerobic capacity, the IF should be used rather than peak power and mean power.
However, the short 30-sec duration of WAnT (20), and the aerobic contribution involved during this
test (27) are factors that are not normally taken into account (22). They should be considered when a
test is suggested for the assessment of anaerobic capacity (31). In this sense, the same as
in WAnt, two hypotheses can be proposed for the lack of correlation between the MP and FI from
RAST and MAOD.
The first hypothesis is related to the loads in RAST. Medbo and colleagues (19) have shown that for
maximum accumulated deficit O2 can be achieved in the supra-maximum effort, but it must be done
by at least 2 min. Therefore, the total duration of the effort during the RAST (~29 ± 1.75 secs, similar
to WAnt) was probably insufficient for a significant depletion of the anaerobic supplies, which likely
had an influence on the correlation between the variables from this methodology and MAOD.
The second hypothesis is related to the intermittent feature of the RAST. In agreement with the
findings of the present study, Glaister and colleagues (11) determined the MP and FI from
an intermittent high intensity protocol, using 20 bouts of 5-sec effort interspersed with 10-sec and 30-
sec intervals. They did not find significant correlation for either MP or FI with MAOD, which indicates
the ability to maintain performance that is different from that observed in maximum permissible short
bouts (e.g., WAnT) is not associated with anaerobic capacity (22).
In this sense, aerobic contribution may be higher in the intermittent high-intensity efforts than in the
continuous efforts of high intensity (e.g., WAnT), mainly by the fact that during periods of recovery
VO2 stays high for the removal of the intra-cellular metabolites such as like inorganic phosphate (Pi)
and lactate. In addition, aerobic metabolism is ongoing during the recovery period for the resynthesis
of phosphocreatine and O2 supply to myoglobin, which is essential for maintaining the performance
(12,33,34). Also, if maximum physical stress is repeated without full recovery of the cellular energy
sources, (i.e., substrates), it may be difficult to maintain the performance (6). It appears therefore that
the contribution of the aerobic RAST values of MP and FI may have been exacerbated by influencing
the correlations of the values with the anaerobic capacity determined by MAOD. More research is
required to better understand the interactions between the variables that relate to both aerobic and
anaerobic metabolism and intermittent high-intensity performances.
A limitation of this study may have been the determination of MAOD using only four submaximal
efforts. However, in support of the present protocol, the practical application of the submaximal
efforts (10-20) proposed by Medbo et al. (19) is not possible during routine training. With this point in
mind, Hill (14) suggested an alternative method for determining the MAOD. That method consists of
using only four submaximal efforts, observing a significant correlation (r = 0.96) between that and the
method proposed by Medbo and colleagues (19). Also, it is apparent that numerous studies have
determined MAOD using five or less submaximal efforts (5,8,13,21,24,36). More studies are needed
to determine the possible correlations between parameters from the RAST and anaerobic capacity,
measured by the MAOD using more points for determining the demand for O2 and submaximal
intensities.
7. 96
CONCLUSIONS
From the results of this study, it can be concluded that the RAST outputs (i.e., peak power, mean
power, and fatigue index) cannot be used to estimate anaerobic capacity.
ACKNOWLEDGMENTS
The 13th Armored Infantry Battalion, based in the city of Ponta Grossa-PR, supported the athletes for
this study.
Address for correspondence: Alessandro Moura Zagatto, Department of Physical Education,
Federal University of Mato Grosso do Sul (UFMS), Av Costa e Silva s/n, Cidade Universitária, CEP
79070-900 Campo Grande-MS, Brazil, Tel: + 55 67 3345 76 27, FAX + 55 67 3345 7630, E-mail:
azagatto@yahoo.com.br
REFERENCES
1. Alizadeh R, Hovanloo F, Safania AM. The relationship between aerobic power and repeated
sprint ability in young soccer players with different levels of VO 2 max J Phys Educ Sport
Manag. 2010;27:86-92.
2. Bar-Or O. The Wingate anaerobic test: An update on methodology, reliability and validity.
Sports Med. 1987;4:381-394.
3. Bertuzzi RCM, Franchini E, Ugrinowitsch C, et al. Predicting MAOD using only a supramaximal
exhaustive test. Int J Sports Med. 2010;3:477-481.
4. Balciunas M, Stonkus S, Abrantes C, Sampaio J. Long term effects of different training
modalities on power, speed, skill and anaerobic capacity in young male basketball players. J
Sports Sci Med. 2006;5:163-170.
5. Buck D, McNaughton NR. Changing the number of submaximal exercise bouts effects
calculation of MAOD. Int J Sports Med. 1999;20:28-33.
6. Christensen EH, Hedman R, Saltin B. Intermittent and continuous running (A. further
contribution to the physiology of intermittent work). Acta Physiol. 1960;50(4):269-286.
7. Cooper SM, Baker JS, Eaton ZE, Matthews N. A simple multistage field test for the prediction
of anaerobic capacity in female games players. Br J Sports Med. 2004;38:784-789.
8. Doherty M. The effects of caffeine on the maximal accumulated oxygen deficit and short-term
running performance. Int J Sports Nutr. 1998;8:95-104.
9. Green S, Dawson BT. The oxygen uptake-power regression in cyclists and untrained men:
Implications for the accumulated oxygen deficit. Eur J Appl Physiol. 1995;70:351-359.
8. 97
10. Gastin PB. Quantification of anaerobic capacity. Scand J Med Sci Sports. 1994;4:91-112.
11. Glaister M, Stone MH, Stewart AM, Hughes MG, Moir GL. Aerobic and anaerobic correlates of
multiple sprint cycling performance. J Strengh Cond Res. 2006;20(4):792-798.
12. Glaister M. Multiple sprint work: Physical responses, mechanisms of fatigue and the influence
of aerobic fitness. Sports Med. 2005;35(9):757-777
13. Gardner A, Osborne M, D’auria S, Jinkins D. A comparison of two methods for the calculation
of accumulated oxygen deficit. J Sports Sci. 2003;21:155-162.
14. Hill DW. Determination of accumulated O2 deficit in exhaustive short-duration exercise. Can J
Appl Physiol. 1996:1:63–74.
15. Hoffman JR, Kang J. Evaluation of a new anaerobic power testing system. J Strength Cond
Res. 2002;16:114-142.
16. Jones AM, Doust JH. A 1% treadmill grade most accurately reflects the energetic cost of
outdoor running. J Sport Sci. 1996;14:321-327.
17. Legaz-Arrese, A, Munguía-Izquierdo, D, Carranza-García, LE, and Torres-Dávila, CG. Validity
of the Wingate anaerobic test for the evaluation of elite runners. J Strength Cond Res.
2011;25:819-824.
18. Moore A, Murphy A. Development of an anaerobic capacity test for field sport athletes. J Sci
Med Sport. 2003;6:275-284.
19. Medbo J, Mohn A, Tabata I, et al. Anaerobic capacity determined by maximal accumulated O2
deficit.J Appl Physiol. 1988;64:50-60.
20. Medbo JI, Burgers S. Effect of training on the anaerobic capacity. Med Sci Sports Exerc.
1990;22:501-507.
21. Mezzani A, Corrà U, Andriani C, et al. Anaerobic and aerobic relative contribution to total
energy release during supramaximal effort in patients with left ventricular dysfunction. J Appl
Physiol. 2008;104:97–102.
22. Minahan C, Chia M, Inbar O. Does power indicate capacity? 30-s Wingate anaerobic test vs.
maximal accumulated O2 deficit. Int J Sports Med. 2007;28:836-843.
23. Maxwell NS, Nimmo MA. Anaerobic capacity: A maximal anaerobic running test versus the
maximal accumulated oxygen deficit. Can J Appl Physiol. 1996;21:35-47.
24. Noordhof DA, Koning JJ, Foster C. The maximal accumulated oxygen deficit method. A Valid
and reliable measure of anaerobic capacity? Sports Med. 2010;40:285-302.
9. 98
25. Nevill AM, Ramsbottom R, Nevill ME, et al. The relative contribution of anaerobic and aerobic
energy supply during tracking 100, 400 and 800 performance. J Sports Med Phys Fitness.
2008;48:138-142.
26. Nummela A, Hämäläinen I, Rusko H. Comparison of maximal anaerobic running tests on a
treadmill and track. J Sports Sci. 2007;25:87-96.
27. Pripstein LP, Rhodes EC, McKenzie DC, Coutts KD. Aerobic and anaerobic energy during a 2-
km race simulation in female rowers. Eur J Appl Physiol. 1999;79:491-494.
28. Ramsbottom R, Nevill ME, Nevill AM, et al. Accumulated oxygen deficit and shuttle
runperformance in physically active men and women. J Sports Sci. 1997;15:207-214.
29. Roseguini AZ, Silva AS, Gobatto CA, Determinações e relações dos parametros anaeróbios
do RAST, do limiar anaerobio e da resposta lactacidemica obtida no inicio, no intervalo e ao
final de uma partida oficial de handebol. Braz J Spors Med. 2008;14:46-50.
30. Rowntree D. Statistics without tears. London: Penguin. 1991:170.
31. Saltin B. Physiological adaptation to physical conditioning. Acta Med Scand. 1987;711:11-24.
32. Scott CB, Roby FB, Lohman TG, Bunt JC. The maximally accumulated oxygen deficit as an
indicator of anaerobic capacity. Med Sci Sports Exerc. 1991;23:618-624.
33. Spencer MR, Gastin PB. Energy system contribution during 200-to1500-m running in highly
trained athletes. Med Sci Sports Exerc. 2001;33:157-162.
34. Tomlin DL, Wenger HA. The relationship between aerobic fitness and recovery from high
intensity intermittent exercise. Sports Med. 2001;31 (1):1-11.
35. Weber CL, Schneider DA. Increases in maximal accumulated oxygen deficit after high-intensity
interval training are not gender dependent. J Appl Physiol. 2002;92:1795-1801.
36. Woolford SM, Withers RT, Craig NP, Bourdon PC, Stanef T, McKinzie I. Effect of pedal
cadence on the accumulated oxygen deficit, maximal aerobic power and blood lactate
transition thresholds of high-performance junior endurance cyclists. Eur J Appl Physiol
Occup Physiol. 1999;80:285-291.
37. Zagatto AM, Beck WR, Gobatto CA. Validity of the running anaerobic sprint test for assessing
anaerobic power and predicting short-distance performances. J Strength Cond Res.
2009;23:1820-1827.
38. Zagatto AM, Redkva P, Loures J, et al. Anaerobic contribution during maximal anaerobic
running test: Correlation with maximal accumulated oxygen deficit. Scand J Med Sci Sports.
2011;1:1-9.
39. Zemková E, Hamar D. “All-Out” tethered running as an alternative to Wingate anaerobic test.
Kinesiology. 2004;36:165-172.
10. 99
40. Zacharogiannis E, Paradisis G, Tziortzis S. An evaluation of tests of anaerobic power and
capacity. Med Sci Sports Exerc. 2004;36:S116.
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