What is typically true about the stroke volume of outstanding athletes during exercise?

The stroke volume of outstanding athletes during exercise typically demonstrates a significant increase. Stroke volume refers to the amount of blood ejected by the heart with each contraction. In well-trained athletes, several physiological adaptations occur that enhance stroke volume, particularly during physical activity.

These adaptations include an increase in the size of the heart's ventricles, improved contractility of the heart muscle, and enhanced venous return due to better vascular tone and muscle pump action. As a result, during exercise, athletes' hearts can pump more blood per beat, contributing to the delivery of oxygen and nutrients to the working muscles more efficiently.

This increase in stroke volume plays a crucial role in maximizing cardiac output, which is essential for maintaining performance during high-intensity exercise. Therefore, it is commonly observed that outstanding athletes have a marked increase in stroke volume when they are engaged in physical training or competitive events.