Powler , long term exercise response (heart

During long-term, moderate to heavy submaximal aerobic exercise, what happens to cardiac output?

It increases rapidly at first, then plateaus and remains relatively constant

What causes the increase in cardiac output during heavy exercise?

Increased stroke volume and heart rate

What happens to stroke volume during long-term, heavy exercise?

It decreases after approximately 50% of V. O2max is achieved

What is the conventional belief about the increase in stroke volume during exercise?

It results from increased venous return and increased contractility Signup and view all the answers

What causes the increase in end-diastolic volume during exercise?

Increased venous return Signup and view all the answers

What causes the decrease in end-systolic volume during exercise?

Increased contractility of the heart Signup and view all the answers

What is the relationship between stroke volume and exercise intensity during long-term, heavy exercise?

Stroke volume plateaus after a certain exercise intensity is reached Signup and view all the answers

What is the Frank-Starling mechanism?

The mechanism by which end-diastolic volume increases during exercise Signup and view all the answers

What is the primary cause of the increase in end-diastolic volume during exercise?

Increased venous return Signup and view all the answers

What is the primary cause of the decrease in end-systolic volume during exercise?

Increased contractility of the heart Signup and view all the answers

What is the relationship between stroke volume and exercise duration during long-term, heavy exercise?

Stroke volume plateaus after a certain exercise duration is reached Signup and view all the answers

What is the relationship between cardiac output and exercise intensity during long-term, heavy exercise?

Cardiac output increases with increasing exercise intensity Signup and view all the answers

During long-term, moderate to heavy aerobic exercise, what happens to cardiac output?

It increases and then plateaus Signup and view all the answers

What is the cause of the increase in cardiac output during heavy exercise?

Both increased stroke volume and heart rate Signup and view all the answers

What happens to stroke volume during long-term, heavy aerobic exercise?

It increases and plateaus Signup and view all the answers

At what workload does stroke volume plateau during long-term, heavy aerobic exercise?

40-50% of V. O2max Signup and view all the answers

During work that requires more than 50% of V. O2max, what happens to stroke volume?

It plateaus Signup and view all the answers

What is the cause of the increase in stroke volume during aerobic exercise?

Increased venous return and increased contractility Signup and view all the answers

What is the cause of the increase in end-diastolic volume during aerobic exercise?

Increased venous return Signup and view all the answers

What is the cause of the decrease in end-systolic volume during aerobic exercise?

Increased contractility Signup and view all the answers

What is the effect of heavy aerobic exercise on stroke volume past 30 minutes?

It decreases Signup and view all the answers

What is the effect of heavy aerobic exercise on cardiac output compared to light to moderate exercise?

It is higher Signup and view all the answers

What is the cause of the initial increase in stroke volume during aerobic exercise?

Increased venous return Signup and view all the answers

What is the cause of the plateau in stroke volume during aerobic exercise?

Increased venous return Signup and view all the answers

Powler , long term exercise response (heart

Questions and Answers

During long-term, moderate to heavy submaximal aerobic exercise, what happens to cardiac output?

What causes the increase in cardiac output during heavy exercise?

What happens to stroke volume during long-term, heavy exercise?

What is the conventional belief about the increase in stroke volume during exercise?

What causes the increase in end-diastolic volume during exercise?

What causes the decrease in end-systolic volume during exercise?

What is the relationship between stroke volume and exercise intensity during long-term, heavy exercise?

What is the Frank-Starling mechanism?

What is the primary cause of the increase in end-diastolic volume during exercise?

What is the primary cause of the decrease in end-systolic volume during exercise?

What is the relationship between stroke volume and exercise duration during long-term, heavy exercise?

What is the relationship between cardiac output and exercise intensity during long-term, heavy exercise?

During long-term, moderate to heavy aerobic exercise, what happens to cardiac output?

What is the cause of the increase in cardiac output during heavy exercise?

What happens to stroke volume during long-term, heavy aerobic exercise?

At what workload does stroke volume plateau during long-term, heavy aerobic exercise?

During work that requires more than 50% of V. O2max, what happens to stroke volume?

What is the cause of the increase in stroke volume during aerobic exercise?

What is the cause of the increase in end-diastolic volume during aerobic exercise?

What is the cause of the decrease in end-systolic volume during aerobic exercise?

What is the effect of heavy aerobic exercise on stroke volume past 30 minutes?

What is the effect of heavy aerobic exercise on cardiac output compared to light to moderate exercise?

What is the cause of the initial increase in stroke volume during aerobic exercise?

What is the cause of the plateau in stroke volume during aerobic exercise?

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