Anaerobic Exercise - Exercise of much higher intensity than aerobic work, which uses up oxygen more quickly than the body can replenish it in the working muscles. Anaerobic exercise eventually builds up a significant oxygen debt that forces an athlete to terminate the exercise session rather quickly. Anaerobic exercise (the kind of exercise to which bodybuilding training belongs) burns up glycogen (muscle sugar) to supply its energy needs. Fast sprinting is a typical anaerobic form of exercise.

Carbohydrates - Organic compounds containing carbon, hydrogen, and oxy-gen. They're a very effective fuel source for the body. The different types of carbohydrates include starches, sugars, and fibers. ('carbohydrates con-tain four calories per gram. Glucose-blood sugar-is a carbohydrate used by every cell in the body as fuel.

Concentric Contraction - When a muscle fiber develops sufficient tension to overcome a resistance so that the muscle visibly shortens and moves a body part against a resistance, it is said to be in concentric contraction. When you curl a dumbbell, the biceps muscle contracts concentrically. The resistance is the combined weight of the forearm and the dumbbell, and the source of resistance is the gravitational pull.

Extension - Body part (i.e. hand, neck, trunk, etc.) going from a bent to a straight position, as in leg extension.

Hypercholesterolemia - unusually high level of cholesterol in blood; also known as high serum cholesterol

Irvine, Sister Marion - 1984 U.S. Olympic Marathon Trials qualifier, who set 85 U.S. National age group records.

Lactose - the sugar in milk; a disaccharide

Lean Body Mass - Everything in the body except fat, including bone, organs, skin, nails and all body tissue including muscle. Approximately 50-60% of lean body mass is water.

Muscle Spasm - Sudden, involuntary contraction of muscle or muscle group.

Stimulants - Class of drugs that increase or excite the central nervous system (CNS). Stimulants may be mild (ephedrine), or powerful (amphetamines).