This study investigated the relationship between strength, body size, and the velocity of volleyball serves and spikes. 30 male university volleyball players were measured for arm strength, grip strength, leg strength, back strength, arm length, hand length, leg length, foot length, and upper body length. Their serve and spike velocities were also recorded. Correlation analyses found significant relationships between serve velocity and arm strength, grip strength, leg strength, back strength, arm length, hand length, leg length, and upper body length. Significant relationships were also found between spike velocity and the same strength and body size measures. A multiple correlation analysis found that arm strength, arm length, and leg strength combined to highly correlate with serve velocity. Overall, the study
The four hamstrings muscles are: the biceps femoris (long head), the biceps
femoris (short head), the semitendinosus, and the semimembranosus. The
two biceps femoris muscles are located on the lateral part of the thigh.
The semitendinosus and the semimembranosus are located on the medial
part of the thigh.
The hamstrings are made up of three
muscles: semitendinosus (ST), semimembranosus (SM) and the biceps femoris
(BF). ST is in the back, inner part of your thighs. SM is in the back, outerish part
of your thighs along with the BF. [Do not get the biceps femoris in your legs
confused with the biceps brachii in your arm..] This group of muscles, in general,
allows us to curl our legs and bring our shins to our butt.
The effect of instability training on knee joint proprioception and core stre...Fernando Farias
A general 10-week IT program utilizing Swiss balls and body mass as a resistance proved effective for improving knee proprioception as well as trunk flexion and extension strength in previously inactive individuals. The present study demonstrates that the use of body weight as a resis- tance under unstable conditions can provide significant improvements in knee proprioception (for as long as 9 months after training) and trunk strength for the untrained population that should contribute to general health and functionality.
John Orchard
Adjunct Associate Professor, Sydney Medical School, University of Sydney.
-
Hamstrings are most susceptible to injury during the late stance phase of sprinting
The four hamstrings muscles are: the biceps femoris (long head), the biceps
femoris (short head), the semitendinosus, and the semimembranosus. The
two biceps femoris muscles are located on the lateral part of the thigh.
The semitendinosus and the semimembranosus are located on the medial
part of the thigh.
The hamstrings are made up of three
muscles: semitendinosus (ST), semimembranosus (SM) and the biceps femoris
(BF). ST is in the back, inner part of your thighs. SM is in the back, outerish part
of your thighs along with the BF. [Do not get the biceps femoris in your legs
confused with the biceps brachii in your arm..] This group of muscles, in general,
allows us to curl our legs and bring our shins to our butt.
The effect of instability training on knee joint proprioception and core stre...Fernando Farias
A general 10-week IT program utilizing Swiss balls and body mass as a resistance proved effective for improving knee proprioception as well as trunk flexion and extension strength in previously inactive individuals. The present study demonstrates that the use of body weight as a resis- tance under unstable conditions can provide significant improvements in knee proprioception (for as long as 9 months after training) and trunk strength for the untrained population that should contribute to general health and functionality.
John Orchard
Adjunct Associate Professor, Sydney Medical School, University of Sydney.
-
Hamstrings are most susceptible to injury during the late stance phase of sprinting
Crimson Publishers- The Effect of Medial Hamstring Weakness on Soft Tissue Lo...CrimsonPublishers-SBB
Anterior cruciate ligament (ACL) reconstructions are frequently performed in the United States of America. The medial hamstrings graft has been shown to produce lower rates of osteoarthritis (OA) than the patellar tendon graft. The goal of this study was to determine how altering medial hamstring strength during surgery affects soft tissue loading, and hence the joint’s proclivity towards OA. Muscle-actuated forward dynamic simulations of running were performed for normal muscle strength and decreased medial hamstring strength. The results show weakening the medial hamstrings caused an overall decrease in total hamstrings force by 7%, in total quadriceps force by 35%, and in cartilage contact force by 6%. This decreased force may be protective against long-term OA.
NSCA National Conference (2013) Podium Presentationcoachademia
Earlier this month, I presented part of my PhD work at the National Strength and Conditioning Association’s National Conference in Las Vegas. These are the slides from the podium presentation which I delivered. If you have any questions about the work presented, then please do get in touch.
Acute effect of different combined stretching methodsFernando Farias
The purpose of this study was to investigate the acute effect of different stretching methods, during a warm-up,
on the acceleration and speed of soccer players. The acceleration performance of 20 collegiate soccer players (body height:
177.25 ± 5.31 cm; body mass: 65.10 ± 5.62 kg; age: 16.85 ± 0.87 years; BMI: 20.70 ± 5.54; experience: 8.46 ± 1.49
years) was evaluated after different warm-up procedures, using 10 and 20 m tests. Subjects performed five types of a
warm-up: static, dynamic, combined static + dynamic, combined dynamic + static, and no-stretching. Subjects were
divided into five groups. Each group performed five different warm-up protocols in five non-consecutive days. The
warm-up protocol used for each group was randomly assigned. The protocols consisted of 4 min jogging, a 1 min
stretching program (except for the no-stretching protocol), and 2 min rest periods, followed by the 10 and 20 m sprint
test, on the same day. The current findings showed significant differences in the 10 and 20 m tests after dynamic
stretching compared with static, combined, and no-stretching protocols. There were also significant differences between
the combined stretching compared with static and no-stretching protocols. We concluded that soccer players performed
better with respect to acceleration and speed, after dynamic and combined stretching, as they were able to produce more
force for a faster execution.
Neuromuscular Adaptations to Sports Training Jill Costley
Neuromuscular Adaptations to Sports Training from my Undergrad Strength and Conditioning placement at the Sports Institute of Northern Ireland. Outcomes: 1) Understand the role of the brain and nervous system in relation to motor control 2) Understand the basic structure of a muscle fibre 3) Appreciate the implications and effects of training on the neuromuscular system. Hope it's useful to someone. Any critical feedback is welcome.
Crimson Publishers- The Effect of Medial Hamstring Weakness on Soft Tissue Lo...CrimsonPublishers-SBB
Anterior cruciate ligament (ACL) reconstructions are frequently performed in the United States of America. The medial hamstrings graft has been shown to produce lower rates of osteoarthritis (OA) than the patellar tendon graft. The goal of this study was to determine how altering medial hamstring strength during surgery affects soft tissue loading, and hence the joint’s proclivity towards OA. Muscle-actuated forward dynamic simulations of running were performed for normal muscle strength and decreased medial hamstring strength. The results show weakening the medial hamstrings caused an overall decrease in total hamstrings force by 7%, in total quadriceps force by 35%, and in cartilage contact force by 6%. This decreased force may be protective against long-term OA.
NSCA National Conference (2013) Podium Presentationcoachademia
Earlier this month, I presented part of my PhD work at the National Strength and Conditioning Association’s National Conference in Las Vegas. These are the slides from the podium presentation which I delivered. If you have any questions about the work presented, then please do get in touch.
Acute effect of different combined stretching methodsFernando Farias
The purpose of this study was to investigate the acute effect of different stretching methods, during a warm-up,
on the acceleration and speed of soccer players. The acceleration performance of 20 collegiate soccer players (body height:
177.25 ± 5.31 cm; body mass: 65.10 ± 5.62 kg; age: 16.85 ± 0.87 years; BMI: 20.70 ± 5.54; experience: 8.46 ± 1.49
years) was evaluated after different warm-up procedures, using 10 and 20 m tests. Subjects performed five types of a
warm-up: static, dynamic, combined static + dynamic, combined dynamic + static, and no-stretching. Subjects were
divided into five groups. Each group performed five different warm-up protocols in five non-consecutive days. The
warm-up protocol used for each group was randomly assigned. The protocols consisted of 4 min jogging, a 1 min
stretching program (except for the no-stretching protocol), and 2 min rest periods, followed by the 10 and 20 m sprint
test, on the same day. The current findings showed significant differences in the 10 and 20 m tests after dynamic
stretching compared with static, combined, and no-stretching protocols. There were also significant differences between
the combined stretching compared with static and no-stretching protocols. We concluded that soccer players performed
better with respect to acceleration and speed, after dynamic and combined stretching, as they were able to produce more
force for a faster execution.
Neuromuscular Adaptations to Sports Training Jill Costley
Neuromuscular Adaptations to Sports Training from my Undergrad Strength and Conditioning placement at the Sports Institute of Northern Ireland. Outcomes: 1) Understand the role of the brain and nervous system in relation to motor control 2) Understand the basic structure of a muscle fibre 3) Appreciate the implications and effects of training on the neuromuscular system. Hope it's useful to someone. Any critical feedback is welcome.
Relationship between Selected Anthropometric Measurement and Volleyball Playe...Sports Journal
The present study was undertaken to find out the significant relationship of selected anthropometric variables with the volleyball playing performance. 25 university level male volleyball players from Guru Ghasidas Univertsity, Bilaspur were selected as a subject for the present study with age range between 18 to 22 years. The following anthropometric variables i.e. Height, Weight, Arm length and Leg length variables were selected for the testing the hypothesis. The playing performance was analyzed by three experts through subjective observation. Pearson’s Product Moment correlation test was employed for the present study and the level of significance was set at 0.05. The statistical test was computed by using standard statistical package SPSS 16. Analysis of the results indicated that Height and Leg length from the anthropometric variables were shown the significant relationship with the volleyball playing performance.
Relative study of explosive strength and maximum leg strength between nationa...Sports Journal
The purpose of the study was to find out the significant difference of Explosive Strength and Maximum
Leg Strength between National Level Wrestlers and Judokas. For present study, total 30 male national
players (15 each from judo and wrestling) with their age ranging between 19-27 years was selected
randomly from Punjabi university, Patiala affiliated colleges. The explosive leg strength measure with
the help of standing broad jump and maximum leg strength measure with the help of leg dynamometer.
Unpaired t-test was employed. The level of significance 0.05 was set. The result shows that insignificant
differences in both variables between National Level Wrestlers and Judokas.
Comparative Study on Physical Fitness of Volleyball and Football Players in U...iosrjce
Background: Physical fitness is an essential first and foremost criterion in every game. Without having physical
fitness no one can elicit his amble performance level. Therefore it is essential to investigate that in which game
among Volleyball and Football, the level of physical fitness is more essential. Aim: The purpose of this study
was to investigate the level of physical fitness of volleyball player and football player in university level.
Methodology: For the present study 15 male volleyball players and 15 male football players were selected
randomly and they had participated in university competition in 2004 from Jadavpur University. Age group of
the subjects was 18-24 years. To find out the physical fitness APHERED Youth Physical Fitness Test were
conducted. Statistics: For comparison of various physical fitness components of volley ball players and football
player independent t-test has done and level of significance has verified at 0.05 levels. Result: Finding reveals
that muscular strength of football player (5.33 times/min. pull ups) was higher than volley ball player (4.87
times/min. pull ups), the muscular endurance of football player (39.86 times sit ups) was higher than volleyball
player (38.73 times sit ups), agility of football player (19.32 sec.) was higher than volleyball player (19.78 sec.),
explosive leg strength of football player (6.90 mts.) was higher than volleyball player (6.78 mts.), Speed of
football player (6.70 sec.) was higher than volley ball player (6.99 sec.) and also cardiovascular endurance of
football player (1.82 min.) was higher than volleyball player (1.82 min.) but the difference in agility and speed
were significant at 0.05 level. Conclusion: The physical fitness of football player was higher than the volleyball
player.
A study of selected biomechanical variables as a factor of hitting performanc...IOSR Journals
Abstract: The modern age of sports is the excellence, so in every sports perfection and purification of skill has
got its immense importance. Biomechanics is an applied form of mechanics and consequently the method used
to investigate it must be derived from those of mechanics. Biomechanics aim to explain the mechanics of life.
Sports biomechanics have also generated other efforts at improving athletic performance in different games and
sports; it is helpful to minimize sports injuries through both identifying dangerous practice and designing safer
equipment and apparel. The purpose of this study was to investigate the relationship of selected biomechanical
variables with the hitting performance in softball.
Keywords: Biomechanical Variable, Centre of gravity, Evaluation of technique, Performance, Softball Hitting
Effect of yogic practices in State level football playersIOSR Journals
Abstract: To see the effect of three month yogic exercise in state level football players 50 state level football
players were selected as a subject. The pre-test, mid test and post test had been taken by using Dynamic
flexibility test, side split flexibility test and shoulder and wrist elevation flexibility test tools. To determine the
difference between the 3 groups (initial, mid and post test) of state level football players F test was employed at
0.05 significance level. And to determine the training effect the t test for comparison mean was employed for
two tails at the confidence level 0.05 level of significant.
The comparative between the initial and post test of dynamic flexibility test, side split flexibility test and
shoulder and wrist elevation flexibility test for the state level football players were found to be statistically
significant at .05 confidence level as the values 10.676, 10.003 and 10.102 respectively were found greater than
the tabulation value (1.98). Key wards: Dynamic flexibility, Side sliding flexibility, shoulder and wrist elevation, F test, comparative t test.
The Analysis of Plyometric Training Program on University Handball PlayersIOSR Journals
Abstract: The purpose of this study was to find out the efficiency of composed plyometric training program on
beginners Handball players force capabilities in their usual training period. The plyometric training program
was applied during 16 week period where was attended twenty-one 12-19 years old beginners Handball
players. Twelve of them were female and nine male handball players. There were three control tastings. All
subjects participated in following tests: standing long jump, depth leap long jump, medicine ball throws up in
10 seconds; medicine ball overhead throws forward against the wall in 10 seconds, maximal vertical jumps to
the maximal height in 10 seconds, maximal vertical jump height. Testing results statistical analysis has shown
athletes legs and arms speed force reliable improvement. Standing long jump, depth leap long jump and
maximal vertical jump height test results, what has shown legs explosive power, has not shown remarkable
reliable difference (P>0.05) . Medicine ball throws and maximal vertical jumps to the maximal height in 10
seconds, what show speed force improvement, showed reliable difference (P<0.01).
Key words: TRAINING METHOD, LEGS AND ARMS SPEED FORCE TRAINING.
Postural Comparison of Dextrous and Ambidextrous PlayersIOSR Journals
Abstract: The purpose of the study was the postural comparison of dexterous and ambidextrous players.
Human posture is the basic thing that a sports man need for his sports performance at an optimum level. Each
and every human beings posture will build up according to the nature of activity.
The purpose of the study was to analyze the postural deformities between dexterous and ambidextrous
players. The subjects were selected from the Kannur university campus, Christ College Irinjalakuda, S N
College Kannur, LNCP Trivandrum, Calicut University Center for Physical Education, ST.Thomas college Pala
and ST.Thomas college Thrissur, the investigator go and collect data from the players. The total number of
hundred (N=100) players and the fifty (n=50) from the each group. The investigator was given a small
description about the test and it’s important to the subjects. The New York posture rating scale was utilized for
the posture assessment. Depending up on the deformity, the players were ranked according to the specific norms
of the test like 5 for good posture, 3 for average, 1 for poor posture. After taking the raw scores of the students,
calculate the percentage of postural deformity by using independent‘t’ ratio.
From the finding we would make understand that the ambi- dexterous players show comparatively good
posture than the dexterous players. Posture of the cricket players was the most fatly than the other players. In
the case of the anterior postural region cricket players and the lateral postural region the volley ball players
had the poor postural level as compared to the other players. The swimmers had the good posture among the
anterior and lateral region of posture.
Muscular strength, functional performances and injury risk in professional an...Fernando Farias
Muscle strength and anaerobic power of the lower extre-
mities are neuromuscular variables that influence perfor-
mance in many sports activities, including soccer. Despite
frequent contradictions in the literature, it may be assumed
that muscle strength and balance play a key role in targeted
acute muscle injuries. The purpose of the present study was
to provide and compare pre-season muscular strength and
power profiles in professional and junior elite soccer players
throughout the developmental years of 15–21.
Correlation of Sergeant Jump & Squats Tests Performance of Basketballers with...Premier Publishers
This study deals with the assessment of leg strength by sergeant jump test and squats test & its correlation with leg measurements and energy intake among young girls and boys undergoing regular basketball training (age: 10-15 yrs, n=400). Players were selected from leading basketball training clubs of Nagpur city, Maharashtra. Foot width, foot length, thigh circumference, calf circumference & ankle circumference were measured using a measuring tape. Leg strength of basketballers was evaluated by means of fitness tests such as sergeant jump test and squats test. Energy intake data was collected by 24 hour’s dietary recall method for consecutive three days. For the present study, both null hypothesis (H0) & non directional alternative hypothesis (H1) were formulated. The difference was tested at both 0.01 & 0.05 levels of significance. Correlations were derived using Pearson’s product moment coefficient of correlation. Basketballers possessed significantly wider & longer feet than standards for age & gender. Effect of age on three leg circumferences (thigh, calf & ankle) was found to be strong, with older girls & boys showed significantly (p<0.01) larger mean thigh, calf & ankle circumference than younger girls & boys. Although basketballers were regular in their daily meal timings, they failed to meet the daily requirements of energy intake. Older basketballers surpassed the younger basketballers with respect to the mean vertical distance jumped. All groups of basketballers were rated excellent for their mean performance of squats test. Leg anthropometry correlated positively with vertical jump & squats test performance of basketballers. Regular basketball training at young age should be coupled with recommended intake of energy to ensure leg strength.
“Relationship of Kinematic Variables with the Performance of Standing Broad J...IOSR Journals
Abstract: The purpose of investigation was to study the relationship of kinematics variables with the
performance of standing broad jump. Subjects were randomly selected from J.N.V. University, Jodhpur and
M.D.S. University, Ajmer. The criterion measure used for this study was the performance in standing broad
jump and selected kinematics variables. To analyze the raw data coefficient of correlation (r) were calculated
and results were compared with the help of Analysis of variance (ANOVA) technique where level of significance
was set at .05.
বাংলাদেশের অর্থনৈতিক সমীক্ষা ২০২৪ [Bangladesh Economic Review 2024 Bangla.pdf] কম্পিউটার , ট্যাব ও স্মার্ট ফোন ভার্সন সহ সম্পূর্ণ বাংলা ই-বুক বা pdf বই " সুচিপত্র ...বুকমার্ক মেনু 🔖 ও হাইপার লিংক মেনু 📝👆 যুক্ত ..
আমাদের সবার জন্য খুব খুব গুরুত্বপূর্ণ একটি বই ..বিসিএস, ব্যাংক, ইউনিভার্সিটি ভর্তি ও যে কোন প্রতিযোগিতা মূলক পরীক্ষার জন্য এর খুব ইম্পরট্যান্ট একটি বিষয় ...তাছাড়া বাংলাদেশের সাম্প্রতিক যে কোন ডাটা বা তথ্য এই বইতে পাবেন ...
তাই একজন নাগরিক হিসাবে এই তথ্য গুলো আপনার জানা প্রয়োজন ...।
বিসিএস ও ব্যাংক এর লিখিত পরীক্ষা ...+এছাড়া মাধ্যমিক ও উচ্চমাধ্যমিকের স্টুডেন্টদের জন্য অনেক কাজে আসবে ...
The simplified electron and muon model, Oscillating Spacetime: The Foundation...RitikBhardwaj56
Discover the Simplified Electron and Muon Model: A New Wave-Based Approach to Understanding Particles delves into a groundbreaking theory that presents electrons and muons as rotating soliton waves within oscillating spacetime. Geared towards students, researchers, and science buffs, this book breaks down complex ideas into simple explanations. It covers topics such as electron waves, temporal dynamics, and the implications of this model on particle physics. With clear illustrations and easy-to-follow explanations, readers will gain a new outlook on the universe's fundamental nature.
How to Add Chatter in the odoo 17 ERP ModuleCeline George
In Odoo, the chatter is like a chat tool that helps you work together on records. You can leave notes and track things, making it easier to talk with your team and partners. Inside chatter, all communication history, activity, and changes will be displayed.
This presentation includes basic of PCOS their pathology and treatment and also Ayurveda correlation of PCOS and Ayurvedic line of treatment mentioned in classics.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Delivering Micro-Credentials in Technical and Vocational Education and TrainingAG2 Design
Explore how micro-credentials are transforming Technical and Vocational Education and Training (TVET) with this comprehensive slide deck. Discover what micro-credentials are, their importance in TVET, the advantages they offer, and the insights from industry experts. Additionally, learn about the top software applications available for creating and managing micro-credentials. This presentation also includes valuable resources and a discussion on the future of these specialised certifications.
For more detailed information on delivering micro-credentials in TVET, visit this https://tvettrainer.com/delivering-micro-credentials-in-tvet/
Investigation of Relationship of Strength and Size of Different Body Parts to Velocity of Volleyball Serve and Spike
1. IOSR Journal of Sports and Physical Education (IOSR-JSPE)
e-ISSN: 2347-6737, p-ISSN: 2347-6745, Volume 2, Issue 3 (May – Jun. 2015), PP 18-22
www.iosrjournals.org
DOI: 10.9790/6737-0231822 www.iosrjournals.org 18 | Page
Investigation of Relationship of Strength and Size of Different
Body Parts to Velocity of Volleyball Serve and Spike
*
Mrinal Das, **
Biplob Roy, ***
Bakul Let, ****
Dr. Kallol Chatterjee
*Assistant Prof., Model B.P.Ed College, Jalpaiguri, West Bengal, India,
**Assistant Prof., Model B.P.Ed College, Jalpaiguri, West Bengal, India,
***Assistant Prof., Model B.P.Ed College, Jalpaiguri, West Bengal, India,
**** Assistant Prof., Visva Bharati University, West Bengal, India,
I. Introducti0n
The modern game of Volleyball puts a great deal of emphasis on the fact that in this game a player is
required to play in all the positions during a match due to obligation of the rule concerned with rotation. At one
time, a player became a Spiker, the next moment a blocker, attack builder, server, a deep defender and so on.
Therefore, a wide variety of techniques have been evolved which have their own and different physical
requirements. As a consequence a player is expected to work on a wide ranging programme designed to improve
his strength, speed, power, agility, flexibility etc. along with possessing a specific body type, height, limb
length, upper body size etc.
Once the above qualities and characteristics are ensured that the game of volleyball has its tactics
which are either individual or collective in nature. The collective i.e. team tactics are based on the total teams
play which necessitates certain combinations of techniques, understanding among the players of the teams,
understanding of the opponents play etc. The individual tactics have their roots in the players themselves which
needs mastery of the techniques as well as tactical application. There are mainly two techniques which have
their tactical utility during the game and which are individual based .These are “the serve” and “the spike”. The
service which happens to be an act of putting the ball in play, if executed tactically by the server can foil the
opponents. Organization of the attacks and the spike executed tactically can fetch a point or get a rally change
during play. But these two techniques have their basis in the strength of certain body parts as well as the size of
certain body parts including the player’s total height.
Serve has become a weapon of attack and its tactical use is important. Generally speaking it is
organized an effective attack. When service is constitutes the other five players in the serving team prepare to
defend. Such of this defend will largely depend on the service. If the service succeeds in putting pressure on the
opposition, if is likely that they will on easy return, which then allow the serving team to build on effective
counter attack. Spike is the finishing touch to the team’s play. It is the shot designed to win the rally for the
team. As a result the spiker has the spot light during a game and every players want to be a specialist spiker,
unfortunately, the physical requirement for top level spiker are more limiting than for any other role in
volleyball. The player must be tall (over 2mts.is usual), and have a good vertical jump, must have sufficient
amount of strength and a definite degree of strength of wrist and shoulder
It is also felt that to hit the ball during spiking and service with a maximum possible velocity one must
have sufficient amount of strength. A definite degree of strength of wrist and shoulder muscle is required for
service, and for spiking. There is need to develop the strength of wrist, shoulder, body, thigh and leg muscles.
Strength development of the lower extremity of the players increases jumping ability which is basic to spiking.
From the bio-mechanical point of view if the arm length is longer, then one will have greater radius of
rotation. As we know at the moment of ball is contacted, the greater linear velocity in the direction of the flight
of the ball is desired. Greater linear velocity is only possible when the radius of rotation is sufficiently longer.
So if the person has longer arm length he can produce greater linear velocity.
The top level performance in particular event demands particular type of body size and shape, other
aspects being similar. A strong relationship between structure of an athlete and specific task has been found.
Clear physical prototypes exist for optimal performance at the level of Olympic Games. So emphasis should be
given to find out the relationship between anthropometric measures and the specific task (event) of an athlete for
high level of performance. Thus realizing the importance of selected strength and body segments variables to the
velocity of the Tennis Service and straight arm spike in volleyball the research scholar undertook the present
study.
Purpose Of The Study
The purpose of the study was to investigate the relationship of strength and size of different body parts
to velocity of volleyball serve and spike.
2. Investigation Of Relationship Of Strength And Size Of Different Body Parts To Velocity Of…
DOI: 10.9790/6737-0231822 www.iosrjournals.org 19 | Page
II. Methodology
For the purpose of the study 30 University represented male volleyball players from Gwalior District
were taken randomly, age ranged from 18 to 26 years. For this study there were two types of variables, namely
Dependent Variable and Independent Variable. Dependent variable was Velocity of Tennis Serve and Straight
Arm Spike (smash) and Independent variables were Arm Strength, Grip Strength, Leg Strength, Back Strength,
Total Arm Length, Hand Length, Leg Length, Foot Length and Length of the Upper Body. Electronic stop
watches were used for taking the time of the ball during service and spiking, the steel tape was used for
measuring the body size and distance of spiked and served ball. To determine the relationship between
dependent variables (velocity of the tennis serve and straight arm spike) and independent variables (strength and
body parts size) Correlation statistics was applied and the Regression Equation was developed.
The level of significance to check the relationship obtained by Pearson’s Product Movement
Correlation and Multiple Correlation was set at 0.05 level of significance.
The scores of each of the dependent variables i.e. selected strength and size of the different body parts
were correlated with dependent variables i.e. the velocity of volleyball service and spike in order to find out
relationship between the dependent and independent variables, these have been presented in table 1, 2, 3 and 4
Table – 1: Representing the relationship of selected strength variables to the velocity of volleyball service
Variables Correlated Correlation Coefficient
Arm Strength (1) and Volleyball Serve 0.83*
Grip Strength (2) and Volleyball Serve 0.48*
Leg Strength (3) and Volleyball Serve 0.60*
Back Strength (4) and Volleyball Serve 0.53*
r 0.05(28) =0.361, * indicating significant, NS indicating not significant.
The Table-1 shows that there is significant relationship between velocity of service in volleyball
and arm strength, grip strength, leg strength and back strength.
Table – 2: Representing the relationship of selected body parts size to the velocity of volleyball service
Variables Correlated Correlation Coefficient
Arm Length (5) and Volleyball Serve 0.63*
Hand Length (6) and Volleyball Serve 0.59*
Leg Length (7) and Volleyball Serve 0.57*
Foot Length (8) and Volleyball Serve 0.24NS
Upper Body Length (9) and Volleyball Serve 0.37*
r 0.05(28) =0.361, * indicating significant, NS indicating not significant.
The Table-2 indicates that there is significant relationship between velocity of service in
volleyball and arm length, hand length, leg length and upper body length. On the other hand no
significant relationship exists between velocity of service in volleyball and foot length.
Table – 3; Representing the relationship of selected strength variables to the velocity of volleyball spike
Variables Correlated Correlation Coefficient
Arm Strength (1) and Volleyball Spike 0.75*
Grip Strength (2) and Volleyball Spike 0.36*
Leg Strength (3) and Volleyball Spike 0.62*
Back Strength (4) and Volleyball Spike 0.52*
r 0.05(28) =0.361, * indicating significant, NS indicating not significant.
The Table-3 clearly shows that there is significant relationship between velocity of spiked ball in
volleyball and arm strength, grip strength, leg strength and back strength.
Table – 4:Representing the relationship of selected body parts size to the velocity of volleyball spike
Variables Correlated Correlation Coefficient
Arm Length (5) and Volleyball Spike 0.51*
Hand Length (6) and Volleyball Spike 0.57*
Leg Length (7) and Volleyball Spike 0.63*
Foot Length (8) and Volleyball Spike 0.17NS
Upper Body Length (9) and Volleyball Spike 0.40*
r 0.05(28) =0.361, * indicating significant, NS indicating not significant.
The Table-2 indicates that there is significant relationship between velocity of spiked ball and
arm length, hand length, leg length and upper body length; whereas the relationship between the velocity
of spiked ball and the foot length is not found to be significant.
3. Investigation Of Relationship Of Strength And Size Of Different Body Parts To Velocity Of…
DOI: 10.9790/6737-0231822 www.iosrjournals.org 20 | Page
The combined effect of independent variables i.e. selected strength variables and size of various body
parts with the velocity of volleyball service was examined by using Multiple Correlation Method. The result
pertaining to this has been presented in table 5.
Table – 5: Representing Combined Contribution of Strength and Body Parts Size to
Velocity of Volleyball Service
Independent Variables Dependent Variables Multiple Correlation
Arm Strength (1)
Arm Length (5)
Leg Strength (3)
Service Velocity (C 1 ) RC 1 0.364 0.927*
r 0.05 (26) = 0.37, * indicating significant, NS indicating not significant.
The Table-5 discloses the combined contribution of arm strength, arm length and leg strength to
the velocity of volleyball service. It is significant at 0.05 level of confidence as the computed value of r
= 0.927 is much greater than 0.37 required for the Multiple Correlation Coefficient to be significant at
0.05 level with 26 degree of freedom. From the obtained value of multiple correlations it can be
concluded that the arm strength, arm length and leg strength taken together contribute significant to
velocity of volleyball serve.
The combined effect of independent variables i.e. selected strength variables and size of various body
parts with the velocity of volleyball spike was examined by using Multiple Correlation Method. The result
pertaining to this has been presented in table 6
Table – 6: Representing Combined Contribution of Strength and Body Parts Size to
Velocity of Volleyball Spike
Independent Variables Dependent Variables Multiple Correlation
Arm Strength (1)
Leg Length (7)
Leg Strength (3)
Service Velocity (C 2) RC 2 0.354 0.843*
r 0.05 (26) = 0.37, * indicating significant, NS indicating not significant.
The findings of Multiple Correlation from Table-6 revealed the combined contribution of arm
strength, leg length and leg strength to velocity of volleyball spike. It is significant at 0.05 level of
confidence as the computed value of r = 0.843 was much higher than 0.37 required for the Multiple
Correlation Coefficient to be significant at 0.05 level with 26 degree of freedom. From the obtained
value of Multiple Correlation it can be concluded that the arm strength, leg length and leg strength taken
together significantly contribute to the velocity of the spiked ball.
Multiple Regression Equation
To predict the velocity of the service and the velocity of the spiked ball with the help of selected
independent variables i.e. selected strength variables and size of the body parts separate regression were drawn.
The resulted equations have been presented as follows:
X1 = 0.023 (Arm Strength) + 0.40 (Arm Length) + 0.45 (Leg Strength) – 36.53
Where X1 = Service Velocity of the ball
X2 = 0.029 (Arm Strength) + 0.133 (Arm Length) + 0.062 (Leg Strength) – 14.86
Where X2 = Spiking Velocity of the ball
III. Discussion And Findings
The velocity of service and spiking in volleyball depend upon many bodily and mechanical factors. But
it is the general observation that a tall and a well built player have an extra advantage as compared to a short and
average built player while executing this technique. This makes us to say that the tall player can develop greater
amount of force as compared to the short player. This basis for this statement lie in strength characteristics as
well as the mechanical factors which are mainly dependent upon the internal body mechanics like the body
leverage, length of power arm, relationship of linear and angular motion etc.
The findings of the present study also fall in line with the above mentioned lines. The main findings of
the study are:
There is significant relationship between selected strength variables to the velocity of volleyball service and
spike.
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DOI: 10.9790/6737-0231822 www.iosrjournals.org 21 | Page
There is significant relationship between body parts size namely leg length, arm length, upper body length
and hand length to the velocity of volleyball service and spike
There is no significant relationship between foot length and velocity of volleyball service and spike.
Arm strength, arm length and leg strength together contribute to velocity of service ball.
Arm strength, leg length and leg strength together contribute to the velocity of spiked ball.
Result of multiple regression analysis indicates that it is possible to make prediction regarding velocity of
volleyball service and spike in volleyball on the basis of strength and body parts size.
From the above mentioned findings we can say that to service and spike with a high velocity a person
must have optimum level of strength not only in his arm but in his back to make an arch, and in his leg for jump
during spike and to provide affirm ground supporting during service.
That is why significance positive relationship between all the four strength variables namely grip
strength, arm strength, back strength and leg strength with the velocity of volleyball service and spike was found
on the other hand significance relationship between arm length with spiking and service velocity is attributed to
the fact that greater the arm length at the time of contact with the ball, greater will be the force, a contributory
factor for the velocity of service and spike. The basis for this is that if the length of the power arm is more that
more force can be generated. Also if the arm length is longer than one will have greater radius of rotation. As we
know at the moment the ball is contacted the greater linear velocity in the direction of the flight of the ball is
desired. The greater linear velocity is the only possible when radius of rotation is the maximum possible. That is
why significance relationship between arm length, leg length, upper body length and hand length to service and
spiked velocity in volleyball was found. But the insignificance relationship of foot length to service and spiking
velocity was found. Probably there is no direct impact of foot length on the velocity of volleyball service and
spike. The findings also show that the independent variables of arm strength , arm length and leg length has got
high relationship with velocity of service where as the arm strength, leg length and leg strength all together
influence the velocity of the spiked ball. These findings may be attributed is the fact that the arm strength is the
principal factor for force generation which ultimately contribute to hitting the ball with a maximum possible in
both cases. From the findings it can also be said that leg strength also be helpful for powerful vertical jump in
case of spike and for service it helps to maintain affirm base of support on the other hand the length of the
power arm (arm length) helps to generate more force at the time of service and at the same time leg length
contributed to force generation to reach high during take-off at the time of spiking. As described before the
length of the power arm as well as radius of rotation provides the basis for developing the greater amount of
force.
IV. Conclusion
The following conclusions have been drawn after statistical calculation.
There is significant relationship between selected strength variables namely arm strength, grip strength, leg
strength, back strength to the velocity of volleyball serve and spike.
There is significant relationship between body parts size namely leg length, arm length, upper body length,
hand length to the velocity of volleyball serve and spike.
The relationship between foot length and velocity of volleyball serve and spike is not significant.
Arm strength, arm length and leg strength together contributed significantly to the velocity of service.
Arm strength, leg length and leg strength together contributed significantly to the velocity of spike.
It is possible to make predictions regarding velocity of service and spiked ball on the basis of strength and
body parts size.
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