Training and Testing Flashcards
What do small bouts of exercise cause?
Short-term changes in the cardiovascular system.
What do the changes in the cvs ensure?
That the respiring skeletal muscle cells are supplied with oxygen for aerobic respiration
What does physical training and repeated exercise cause?
Long-term changes to the cvs. These are fundamental adaptations that allow the body to cope with increased workload imposed by the training regime
What is cardiac hypertrophy?
The increase of the heart muscle mass during the course of an exercise training programme.
Why does the left ventricle show the greatest increase in size?
Because it is the chamber which supplies the increased demand from the muscles.
Why does the cardiac muscle become thicker?
Because each cell has more contractile elements, thereby increasing the strength of the cardiac muscle.
What is the effect of the stronger heart muscle on the stroke volume?
Larger stroke volume each time the left ventricle contracts.
What is the average change in maximum co between an average person and an athlete?
22litres per minute to 35 litres per minute.
What is the effect on the heart rate by the increased strength of the heart muscle?
Increase in the potential maximal heart rate during exercise.
Heart rate remains lower when workload is increased.
Reduces resting heart rate.
What is the effect on the maximum cardiac output by the increased stroke volume?
Higher maximum cardiac output.
How is myocardial circulation is improved?
By increasing the density of the capillary networks
Where might a denser capillary network also develop?
In the skeletal muscles that are being worked.
What is the effect of the denser capillary network?
The muscles are less likely to become anaerobic.
Why is the recovery time shorter in an athlete than a normal person?
Because there is less build up of lactic acid during exercise.
What is the limiting factor for a muscles performance?
The rate of oxygen uptake.
