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Questions and Answers
What adaptation leads to an increase in stroke volume due to an increase in left ventricle mass?
What adaptation leads to an increase in stroke volume due to an increase in left ventricle mass?
- Increased compliance
- Increased blood pressure during exercise
- Increased contractility (correct)
- Decreased contractility
Which physiological change does NOT contribute to an increase in aerobic capacity?
Which physiological change does NOT contribute to an increase in aerobic capacity?
- Decreased blood volume (correct)
- Increased left ventricle mass
- Increased stroke volume
- Increased compliance
During endurance training, which adaptation is likely to occur more significantly than in strength training?
During endurance training, which adaptation is likely to occur more significantly than in strength training?
- Decreased compliance
- Decreased blood volume
- Increased stroke volume
- Increase in left ventricle mass (correct)
Which of the following changes is associated with improved filling of the heart during diastole?
Which of the following changes is associated with improved filling of the heart during diastole?
Hypertrophic cardiomyopathy is most associated with which physiological consequence?
Hypertrophic cardiomyopathy is most associated with which physiological consequence?
What effect does increased left ventricle mass have on stroke volume during training adaptations?
What effect does increased left ventricle mass have on stroke volume during training adaptations?
Which adaptation results from an increase in blood volume during endurance training?
Which adaptation results from an increase in blood volume during endurance training?
How does increased compliance of the heart chambers affect cardiac efficiency?
How does increased compliance of the heart chambers affect cardiac efficiency?
What is a physiological consequence of adaptations that improve aerobic capacity?
What is a physiological consequence of adaptations that improve aerobic capacity?
Which factor contributes to the increase in stroke volume more significantly in strength training compared to endurance training?
Which factor contributes to the increase in stroke volume more significantly in strength training compared to endurance training?
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Study Notes
Adaptations that Increase Stroke Volume (=> Cardiac Output)
- Increased left ventricle mass by approximately 20%
- Increase in contractility
- Note: A larger increase occurs with strength training compared to endurance training due to the increased pressure.
- Faster relaxation (Filling)
- Increase in contractility
- Increased blood volume
- Increases end-diastolic volume (EDV)
Hypertrophic Cardiomyopathy
- Leading cause of sudden cardiac death in young athletes.
Aerobic Adaptations
- Training adaptations lead to an increase in stroke volume (SV) which causes an increase in cardiac output (CO).
- Increased left ventricle mass (approximately 20%)
- This is driven by an increase in contractility
- Strength training results in larger increases compared to endurance training due to the increased pressure applied
- Increased compliance
- Faster relaxation of the left ventricle, allowing for faster filling
- Increased blood volume
- This increases the end diastolic volume (EDV)
Hypertrophic Cardiomyopathy (Pathological)
- The leading cause of Sudden Cardiac Death (SCD) in young athletes is Hypertrophic Cardiomyopathy.
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