Final answer:
Muscular strength is the ability to exert force during a contraction, while muscular endurance is the ability to contract repeatedly without getting tired. Traditional definitions of strength involve using force in a direction aligned with the motion, like lifting weights or pushing objects.
Step-by-step explanation:
Muscular strength is the ability of a muscle to exert force during a contraction, while muscular endurance is the ability of a muscle to contract repeatedly over a prolonged period without getting tired. These two aspects of strength are important for overall fitness and are improved through exercise. Traditional definitions of strength involve the ability to use force when the motion is aligned with the direction of the force, such as pushing a box or lifting a weight.