Define Muscular endurance component for physical fitness?

It is the ability of a muscle, or a group of muscles to sustain repeated contractions or to continue applying force against a fixed object. This is the ability to hold a particular position for a sustained period of time or repeat a movement many times. This could be explained as the capability required holding a specific weight above your head for five minutes or the effort required to lift that weight 20 consecutive times. Push-ups are often used to test endurance of arm and shoulder muscles. Muscular endurance depends to a large extent on cardiovascular endurance. Weak muscles cannot repeat an action several times, nor sustain it for a prolonged period of time.