Unlike highly trained subjects, for most individuals stroke volume continues to increase during incremental exercise up to approximately  40% of VO2 max. 60% of VO2 max. 75% of VO2 max. 85% of VO2 max.

Why is stroke volume higher during exercise in trained athletes?

What is ‘stroke volume’?

During heavy-intensity exercise, increases in cardiac output are associated with increases in_________a.the % of cardiac output increases, and the volume of blood increasesb.the % of cardiac output decreases, and the volume of blood increasesc.the % of cardiac output is unchanged, and the volume of blood is unchangedd.both systolic pressure generation and stroke volume.

The arterial-mixed venous oxygen difference increases as a function of exercise intensity. does not change during exercise. decreases as the exercise intensity increases. plateaus after about 40% to 60% VO2 max.

During prolonged, strenuous exercise without fluid replacement the increase in heart rate is associated with:Group of answer choicesreduced stroke volumereduced plasma adrenalineincreased vagal activity