A unit of metabolic equivalent, or MET, is defined as the ratio of a person's working metabolic rate relative to the
resting metabolic rate. One MET is defined as 1 kilocalorie per kilogram per hour and is the caloric consumption of a person while at complete rest. For example, one might consider the restful state following a quiet night's sleep as a good example of a single MET. This is a base-line unit for that one individual, and since each individual has a varying BMR, a MET is, therefore, variable from one person to the next. One might consider a single unit the energy required to just stay alive without doing anything more.
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