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Cardiorespiratory Adaptations to
Training
-Dr. Diksha Gondkar, MPT (Neuro)
Cardiovascular Adaptations
From Aerobic Training
 Increased cardio-respiratory endurance
 Increased muscular endurance
 Decreased VO2 at rest and submaximal exercise
 IncreasedVO2 Max
 Increased heart weight, volume, and chamber size
 Increased left ventricle wall thickness “athletes heart”
 Increased left ventricle EDV
 Increased blood plasma
 Increased Stroke Volume
 from increased EDV and decreased ESV = increased EF
 Frank-Starling law: elastic recoil of the ventricle
Cardiovascular Adaptations
From Aerobic Training
 Decreased resting heart rate
 from increased parasympathetic activity and decreased
sympathetic activity.
 Decreased submaximal heart rate
 Decreased maximum heart rate of elite athletes
 if your heart rate is too fast the period of ventricular filling is
reduced and your stroke volume might be compromised.
 the heart expends less energy by contracting less often but
more forcibly than it would by contracting more often.
 Decreased Heart Rate Recovery
Cardiovascular Adaptations
From Aerobic Training
 Maintained cardiac output at rest and submaximal
exercise
 Increased cardiac output during maximal exercise
 Increased blood flow to the muscles
 increased capillarization of trained muscles
 greater opening of existing capillaries in trained muscles
 more effective blood redistribution
 increased blood volume
 decreased blood viscosity & increased oxygen delivery
 Decreased resting blood pressure, but is unchanged
during exercise
 from increased blood flow
Cardiovascular Adaptations
From Aerobic Training
 Increased blood volume (blood plasma) and is greater
with more intense levels of training
 increased release of antidiuretic hormone
 increased plasma proteins which help retain blood fluid
 increased red blood cell volume
 decreased blood viscosity
Respiratory Adaptations From
Aerobic Training
 Respiratory system functioning usually does not
limit performance because ventilation can be
increased to a greater extent than cardiovascular
function.
 Slight increase in Total lung Capacity
 Slight decrease in Residual Lung Volume
 Increased Tidal Volume at maximal exercise levels
 Decreased respiratory rate and pulmonary
ventilation at rest and at submaximal exercise
 (RR) decreases because of greater pulmonary efficiency
 Increased respiratory rate and pulmonary ventilation
at maximal exercise levels
 from increased tidal volume – Inc max O2 consumption
Respiratory Adaptations From
Aerobic Training
 Unchanged pulmonary diffusion
at rest and submaximal exercise.
 Increased pulmonary diffusion
during maximal exercise.
 from increased circulation and
increased ventilation
 from more alveoli involved during
maximal exercise
 Increased A-VO2 difference
especially at maximal exercise.
Metabolic Adaptations From
Aerobic Training
 Lactate threshold occurs at a higher percentage of
VO2 Max.
 from a greater ability to clear lactate from the muscles
 from an increase in skeletal muscle enzymes
 Decreased Respiratory Exchange Ratio (ratio of
carbon dioxide released to oxygen consumed)
 from a higher utilization of fatty acids instead of carbs
 however, the RER increases from the ability to perform at
maximum levels of exercise for longer periods of time
because of high lactate tolerance.
 Increased resting metabolic rate
 Decreased VO2 during submaximal exercise
 from a metabolic efficiency and mechanical efficiency
Metabolic Adaptations From
Aerobic Training
 Large increases in VO2 Max
 in mature athletes, the highest attainable VO2 Max is
reached within 8 to 18 months of heavy endurance
training.
 VO2 Max is influenced by “training” in early
childhood.
 from increased oxidative enzymes
 from increased size and number of mitochondria
 from increased blood volume, cardiac output & O2
diffusion
 from increased capillary density
Cardiorespiratory Adaptations
From Anaerobic Training
 Small increase in cardiorespiratory endurance
 Small increase in VO2 Max
 Small increases in Stroke Volume
Cardiorespiratory Adaptations
From Resistance Training
 Small increase in left ventricle size
 Decreased resting heart rate
 Decreased submaximal heart rate
 Decreased resting blood pressure is greater than from
endurance training
 Resistance training has a positive effect on aerobic
endurance but aerobic endurance has a negative
effect on strength, speed and power.
 muscular strength is decreased
 reaction and movement times are decreased
 agility and neuromuscular coordination are decreased
 concentration and alertness are decreased
Factors Affecting the
Adaptation to Aerobic
Training
 Heredity accounts for between 25% and 50% of the
variance in VO2 Max values.
 Age-Related decreases in VO2 Max might partly
result from an age-related decrease in activity levels.
 Gender plays a small role (10% difference) in the VO2
Max values of male and female endurance athletes.
 There will be RESPONDERS (large improvement)
and NONRESPONDERS (little improvement) among
groups of people who experience identical training.
 The greater the Specificity of Training for a given
sport or activity, the greater the improvement in
performance.
Bibliography
 Cardiovascular adaptations to exercise and training.
Vet Clin North Am Equine Pract. 1985 Dec;1(3):513-
31.
 Physiology of Sport and Exercise Jack Wilmore,
David Costill 3rd Edition 2004
 CARDIOVASCULAR ADAPTATIONS by M. Doug
McGuff, M.D.

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Cardiovascular adaptations to training

  • 2. Cardiovascular Adaptations From Aerobic Training  Increased cardio-respiratory endurance  Increased muscular endurance  Decreased VO2 at rest and submaximal exercise  IncreasedVO2 Max  Increased heart weight, volume, and chamber size  Increased left ventricle wall thickness “athletes heart”  Increased left ventricle EDV  Increased blood plasma  Increased Stroke Volume  from increased EDV and decreased ESV = increased EF  Frank-Starling law: elastic recoil of the ventricle
  • 3. Cardiovascular Adaptations From Aerobic Training  Decreased resting heart rate  from increased parasympathetic activity and decreased sympathetic activity.  Decreased submaximal heart rate  Decreased maximum heart rate of elite athletes  if your heart rate is too fast the period of ventricular filling is reduced and your stroke volume might be compromised.  the heart expends less energy by contracting less often but more forcibly than it would by contracting more often.  Decreased Heart Rate Recovery
  • 4. Cardiovascular Adaptations From Aerobic Training  Maintained cardiac output at rest and submaximal exercise  Increased cardiac output during maximal exercise  Increased blood flow to the muscles  increased capillarization of trained muscles  greater opening of existing capillaries in trained muscles  more effective blood redistribution  increased blood volume  decreased blood viscosity & increased oxygen delivery  Decreased resting blood pressure, but is unchanged during exercise  from increased blood flow
  • 5. Cardiovascular Adaptations From Aerobic Training  Increased blood volume (blood plasma) and is greater with more intense levels of training  increased release of antidiuretic hormone  increased plasma proteins which help retain blood fluid  increased red blood cell volume  decreased blood viscosity
  • 6. Respiratory Adaptations From Aerobic Training  Respiratory system functioning usually does not limit performance because ventilation can be increased to a greater extent than cardiovascular function.  Slight increase in Total lung Capacity  Slight decrease in Residual Lung Volume  Increased Tidal Volume at maximal exercise levels  Decreased respiratory rate and pulmonary ventilation at rest and at submaximal exercise  (RR) decreases because of greater pulmonary efficiency  Increased respiratory rate and pulmonary ventilation at maximal exercise levels  from increased tidal volume – Inc max O2 consumption
  • 7. Respiratory Adaptations From Aerobic Training  Unchanged pulmonary diffusion at rest and submaximal exercise.  Increased pulmonary diffusion during maximal exercise.  from increased circulation and increased ventilation  from more alveoli involved during maximal exercise  Increased A-VO2 difference especially at maximal exercise.
  • 8. Metabolic Adaptations From Aerobic Training  Lactate threshold occurs at a higher percentage of VO2 Max.  from a greater ability to clear lactate from the muscles  from an increase in skeletal muscle enzymes  Decreased Respiratory Exchange Ratio (ratio of carbon dioxide released to oxygen consumed)  from a higher utilization of fatty acids instead of carbs  however, the RER increases from the ability to perform at maximum levels of exercise for longer periods of time because of high lactate tolerance.  Increased resting metabolic rate  Decreased VO2 during submaximal exercise  from a metabolic efficiency and mechanical efficiency
  • 9. Metabolic Adaptations From Aerobic Training  Large increases in VO2 Max  in mature athletes, the highest attainable VO2 Max is reached within 8 to 18 months of heavy endurance training.  VO2 Max is influenced by “training” in early childhood.  from increased oxidative enzymes  from increased size and number of mitochondria  from increased blood volume, cardiac output & O2 diffusion  from increased capillary density
  • 10. Cardiorespiratory Adaptations From Anaerobic Training  Small increase in cardiorespiratory endurance  Small increase in VO2 Max  Small increases in Stroke Volume
  • 11. Cardiorespiratory Adaptations From Resistance Training  Small increase in left ventricle size  Decreased resting heart rate  Decreased submaximal heart rate  Decreased resting blood pressure is greater than from endurance training  Resistance training has a positive effect on aerobic endurance but aerobic endurance has a negative effect on strength, speed and power.  muscular strength is decreased  reaction and movement times are decreased  agility and neuromuscular coordination are decreased  concentration and alertness are decreased
  • 12. Factors Affecting the Adaptation to Aerobic Training  Heredity accounts for between 25% and 50% of the variance in VO2 Max values.  Age-Related decreases in VO2 Max might partly result from an age-related decrease in activity levels.  Gender plays a small role (10% difference) in the VO2 Max values of male and female endurance athletes.  There will be RESPONDERS (large improvement) and NONRESPONDERS (little improvement) among groups of people who experience identical training.  The greater the Specificity of Training for a given sport or activity, the greater the improvement in performance.
  • 13. Bibliography  Cardiovascular adaptations to exercise and training. Vet Clin North Am Equine Pract. 1985 Dec;1(3):513- 31.  Physiology of Sport and Exercise Jack Wilmore, David Costill 3rd Edition 2004  CARDIOVASCULAR ADAPTATIONS by M. Doug McGuff, M.D.