What happens to the events of the cardiac cycle during exercise?

Question

Quizplus · Accepted Answer

During exercise, the demand for oxygen and nutrients increases, leading to an increase in sympathetic nervous system activity and release of catecholamines. This leads to increased contraction force (contractility) of the ventricles, allowing for more blood to be ejected (increased stroke volume) with each heartbeat. This is also why the heart rate increases during exercise – to increase cardiac output (heart rate x stroke volume). Choices A, B, and D are incorrect because they do not accurately describe the effects of exercise on the cardiac cycle.

What Happens to the Events of the Cardiac Cycle During