Aging - The general deterioration of the body with increasing age.

Amino acids - A group of compounds that serve as the building blocks from which protein and muscle are made.

Courtney, Thomas - Won the 1956 800m at Melbourne by one second over Great Britain's Derek Johnson in an Olympic record time of 1.47,7. Courtney's win gave the Usa four straight Olympic victories in the 2-lap event.

Flack, Edwin - The Australian winner of the 800m (2.11,0), and the 1500m (4.33,2) at the 1896 Olympics.

Lactic Acid - A product given off during aerobic respiration. Lactic acid was once thought to be strictly a waste product, however, recent evidence suggests that a version of lactic acid called lactate is used by the liver to replenish glycogen supplies.

Meal - Food that's eaten at one time. Each meal should contain a portion (which is the size of the palm of your hand or your clenched fist) of protein and a portion of carbohydrates.

Natural Foods - unchanged; contain no additives

Newton, Albert - American runner that came in 3rd in the 40K long 1904 Olympic marathon.

Progressive Resistance - Method of training where weight is increased as muscles gain strength and endurance, the backbone of all weight training.

Waitz, Grete - One of the greatest distance runners of all time. Broke the world marathon record at the 1978 "New York City Marathon", when she recorded in 2:32:30. That was the first of her 9 "New York City Marathon" wins. Waitz won 5 World Cross Country titles. She also won the silver medal in the Los Angeles Olympic Marathon in 1984. Grete Waitz later started coaching another great runner, Scotland's Liz McColgan.

Weight Class - In order for bodybuilders to compete against men and women or similar size, the IFBB has instituted weight divisions for all amateur competitions. The normal men's weight classes are under 70 kilograms (154 pounds), under 80 kilograms (175 pounds), under 90 kilograms (198 pounds), and over 90 kilograms (over 198 pounds, term "heavyweight"). In a minority of competitions, particularly in the Far East, one additional class, under 65 kilograms (143 pounds) is also contested. Women compete in three weight classes - under 114 pounds, under 123 pounds, and over 123 pounds.

Working Set - The set(s) you perform after finishing a warm up or stretching.