Which exhibits the highest percent of change in a marathon runner?
I.Cardiac output
II.Stroke volume
III.Heart rate
A) I only
B) II only
C) III only
D) I and II increase by the same amount

Question

Quizplus · Accepted Answer

Cardiac output exhibits the highest percent of change in a marathon runner because it is the product of heart rate and stroke volume, both of which increase during intense exercise.

Which Exhibits the Highest Percent of Change in a Marathon