Muscular Strength & Endurance. Muscle tone - refers to the firmness of your muscles. Metabolism - burning of calories necessary to supply the body with the energy it needs to function . Calories - A calorie is a unit of heat used to express the energy value of food .
Muscular strength measures the amount of force a muscle can produce against a resistance one time.
Muscular endurance measures multiple muscular contractions over an extended period of time to cause fatigue
Muscular strength is handy when you need to open jars, lift groceries, get out of a chair, etc.