Question
148. The following are all cardiac responses to they increase or decrease as a result of long term training? Resting heart rate A B Maximum cardiac output A B Resting stroke volume A B Size of heart A square B
Answer
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Eugenie
Master · Tutor for 5 years
Answer
For resting heart rate answer is A. For maximum cardiac output answer is B. For resting stroke volume answer is B. For size of heart answer is B.
Explanation
Long term exercise can produce various changes in the cardiac system. Let’s evaluate each cardiac response:1. Resting heart rate: It generally decreases with long term exercise firstly because the heart muscle becomes stronger increasing the amount of blood that can be pumped in a single beat - hence fewer beats are required every minute. 2. Maximum cardiac output: It generally increases with regular exercise because with greater heart efficiency and capacity, moreblood can be pumped out per minute.3. Resting stroke volume: This is typically increased by long-term exercise. The stroke volume is the quantity of blood eject by the heart with every beat. During long-term exercise, the heart increases its muscular strength resulting in an increased stroke volume.4. The size of the heart: It might grow slightly in size with long term vigorous exercise due to muscular hypertrophy. The heart is a muscle and the demand placed on it during hard training may cause the heart muscles to thicken in a similar way to how bicep muscles thicken when regularly exercising with heavy weights.