Muscular endurance refers to the ability to perform a specific muscular action for a prolonged period of time. For example, your ability to run a marathon or to pump out 50 bodyweight squats is a product of good muscular endurance. You also use muscular endurance in your daily life when you rake leaves or walk up long flights of stairs.
Muscular strength is a muscle’s capacity to exert brute force against resistance. Your ability to bench press a barbell weighing 200 lbs. for one repetition is a measure of your muscular strength. In daily life, you need muscular strength to pick up a heavy box.
