Stroke volume is the amount of blood that the heart can pump per minute.

Cardiorespiratory Fitness

The ability of the heart, lungs, and vascular system to supply oxygen-rich blood to working muscles during sustained physical activity.

Oxygen-rich Air

Air that has a higher concentration of oxygen than is found at sea level, often used for therapeutic purposes or in high-altitude environments.

Lungs

Respiratory organs responsible for exchanging oxygen and carbon dioxide between the blood and the air.