Body fat - What is left when you subtract muscles (body lean),water, bones and vital organs. Usually expressed in a percent.

Isokinetic contraction - A dynamic method of muscle training where the speed of movement is held constant by a training device. No matter whether you exert a little force or all-out force, speed stays the same. Often used in testing or physical therapy.

Insulin - a hormone secreted by special cells in the pancreas in response to increased blood glucose (blood sugar) concentrations

Enrichment - the addition of a nutrient to a processed food to replace losses of the nutrient that occurred during processing or to enhance its nutritive composition. Most commonly used for cereals and pastas

Catabolism - reactions that involve the breakdown of compounds in the body, including the reactions that release energy from foods

Basal metabolism (BMR) - 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

Set - a number of repetitions of a movement, such as an arm curl or a squat. Squatting down and back up is one rep. Doing that 8 times would be one "set"

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