What is an indicator of muscular endurance?

Muscular endurance is primarily defined as the ability of a muscle group to sustain repeated contractions against a resistance for an extended period. This is effectively demonstrated through the capability to perform a high number of repetitions at a submaximal weight. When muscles are able to continuously contract and perform multiple repetitions without significant fatigue, it signifies a strong level of endurance.

The focus is on lighter weights that are manageable over a longer duration, as opposed to high resistance, which is more aligned with strength. Therefore, being able to perform many repetitions indicates not only the stamina of the muscles but also their efficiency in utilizing oxygen and energy over time.