What is muscular endurance?

Muscular endurance refers specifically to the ability of a muscle or group of muscles to sustain repeated contractions or maintain a contraction over an extended period. This definition aligns perfectly with the notion of performance in a particular exercise over time, highlighting how muscles can endure fatigue during activities that require prolonged effort. It is not focused on the maximum amount of weight that can be lifted, which is a measure of strength, nor is it solely concerned with aerobic capacity, like running long distances. Additionally, while muscle contractions do produce strength, the term "muscular endurance" emphasizes the duration and frequency of these contractions rather than their intensity. Hence, the focus is on how well muscles can perform tasks over a duration, making the choice about the amount of time muscles can perform a particular exercise the most accurate representation of muscular endurance.