How do cardiorespiratory fitness and endurance differ from each other?

Cardiorespiratory fitness is the ability of the heart, lungs, and circulatory system to efficiently supply oxygen and nutrients to the muscles during exercise. This can be measured by factors such as maximal oxygen uptake (VO2max) and other cardiovascular parameters.

Endurance, on the other hand, refers to the ability of the muscles to sustain a given amount of work over time without fatigue. This can be measured by factors such as the number of repetitions or duration of an exercise performed before fatigue sets in.

In short, cardiorespiratory fitness is more focused on the cardiovascular system's ability to supply oxygen and nutrients, while endurance is a measure of a muscle's ability to perform work over time.