FDA (Food & Drug Administration) - It is the US federal agency responsible for the regulation of pharmaceuticals (drugs) and food products

Jog - A slow or very easy run. Often considered an insulting term by serious runners who just call it an easy run.

Race walk - A specific, speedy walking technique that must follow rules and is judged (when performed in competitions). An Olympic sport since 1908.

Heart rate calculations - Standard formula is 220 - (your age) for men, 226 - (your age) for women. Error is 10-15 beats either way since heart rate maximums are genetically determined.

Recovery heart rate - see Heart rate, recovery

Vitamins - organic, essential nutrients required in small amounts and sometimes harmful in excessive amounts.

Intervals - Exercise that alternates high intensity ("work") with easy or light intensity ("recovery"). Used by performance athletes for speed and endurance.

BMR (basal metabolic rate) - the rate of energy used for metabolism when the body is at complete rest - closely related to the muscle mass. Usually measured by the amount of oxygen consumed. Acknowledged by experts to be difficult to measure accurately

Diabetes Type 1 (insulin dependent diabetes) - occurs when the pancreas does not produce insulin at all leading to elevated blood glucose

Fad diets - fashionable or trendy diets that may or may not actually help in reducing weight. These diets should be used with caution and a professional medical opinion sought. See our take on fad diets for more details

Intervals - speed workouts, usually run on a track, with distances and target paces decided before you run. They typically consist of relatively short sprints of 220 yards to 1 mile interspersed with rest periods of slower running

Isometrics - a system of exercise in which opposing muscles are contracted. There is little movement even though both muscle sets are exerting force

Kilometer - A metric measurement commonly used in athletic distances. Abbreviated Km or K. 1K equals 0.62 miles. Inversely, 1 mile equals 1.62 kilometers. 5K is 3.1 miles, while 10K (this is higher math) is 6.2 miles.

Kinesiology - the study of the principles of mechanics and anatomy in relation to human movement

Trapezius or "traps" - the triangular muscles stretching across your back from the spine to the shoulder blades and collarbone. Its used to "shrug" your shoulders