Collar - The clamp that is used to hold plates securely in place on a barbell or dumbbell bar. The cylindrical metal clamps are held in place on the bar by means of a set screw threaded through the collar and tightened securely against the bar. Inside collars keep plates from sliding inward and injuring your hands, while outside collars keep plates from sliding off the barbell in the middk of an exercise.

Elliott, Herb - Never beaten in the mile in his entire career, Elliott ranks as one of the greatest middle-distance runners of all time. He won the 1960 Olympic 1500m in Rome in the record time of 3.35,6 - nearly 3 seconds faster than the runner-up Michel Jazy of France. Elliott won 44 races in a row between 1954 and 1960.

IFBB - International Federation of Bodybuilders, founded in 1946 - group that over-sees worldwide men's and women's amateur and professional bodybuilding.

Insulin - Hormone produced by the pancreas which controls the blood's level of glucose and amino acids.

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

Low-glycemic - Low glycemic foods are broken down into glucose less quickly than high-glycemic foods and enter the bloodstream at a much slower rate.

Muscle - Tissue consisting of fibers organized into bands or bundles that contract to cause bodily movement. Muscle fibers run in the same direction as the action they perform.

Shoes - Shoes act to stabilize your balance and improve your balance in training. The design of shoes varies depending on their use, whether it is for running, or outdoor recreational activities, or simply day to day wear. The main quality of shoes, no matter which you choose, is support. Solid, thick soled shoes with good arch support are the best you can choose.

Thogersen, Thyge (1926-) - Danish runner that finished 24th in the 1952 Olympic 10000m run, and 6th at the 1960 Olympic Marathon. Won nationals on 5000m 8 times, 10000m 12 times, 20K 6 times, marathon 3 times, and Cross Country 4 times. Lowered the national record on 5000m from 14.28,4 to 14.09,4, and the 10000m record from 30.20,6 to 29.45,0. He also ran in the 1956 Melbourne Olympics, where he finished 8th on the 5000m (14.21,0) and 15th on the 10000m (30.18,0).

Thyroid Gland - Small gland located at the neck that controls the body's level of calcium and overall metabolic rate. Bodybuilders often add thyroid drugs to their precontest drug stacks to increase their body's metabolic rate and increase the rate of fat loss.