Muscular endurance is defined as which of the following?

• A. Ability to contract muscles for a long time without tiring
• B. Amount of force a muscle can exert
• C. Range of motion of joints
• D. Ability to perform aerobic exercise for extended periods

Answer: (A)

Muscular endurance is the ability of a muscle or muscle group to perform repeated contractions or sustain a contraction over time without fatigue. That description fits best because it focuses on how long a muscle can work before tiring. In contrast, strength is about the maximum force a muscle can produce in a single effort, flexibility is about the range of motion around a joint, and aerobic endurance is about sustaining activities that rely on oxygen over extended periods. Training for muscular endurance involves higher repetitions or sustained efforts with lighter to moderate resistance, such as push-ups, planks, or circuit-style workouts, rather than heavy one-repetition max lifts or long cardio sessions.