The ratio of body fat to lean body tissue, including muscle, bone, water, and connective tissue such as ligament, cartilage, and tendons.

The ability to move a body part through a full range of motion.

The amount of force a muscle can exert.

The ability of the muscles to do difficult physical tasks over a period of time without causing fatigue.

The ability of the heart, lungs, and blood vessels to send fuel and oxygen to the body's tissues during long periods of vigorous activity.

A way of  life that requires little movement or exercise.

The process by which your body gets energy from food.

The minimum amount of energy required to maintain the life process of the body.

Units of heat.

Vigorous activity in which oxygen is continuously taken in for a period of at least 20 minutes.

Intense bursts of activity in which the muscles work so hard that they produce energy without oxygen.

Activity that uses muscle tension to improve muscle strength with little or no movement of the body part.

Activity that combines muscle contraction with repeated movement.

Activity that involves resistance through an entire range of motion.

Combining various exercise routines to help work different body systems.

Working the body harder than it is normally worked.

A gradual increase in overload necessary for achieving higher levels of fitness.

Principle that states that particular exercises and activities improve particular areas of health related fitness.

Engaging in that prepares the muscles for the work that is to come.

Engaging in activity to gradually decrease activity.

The number of times your heart beats in one minute when you are not active.