What are "metabolic equivalents" (METs)?

Metabolic equivalents, commonly referred to as METs, are indeed a unit used to estimate the amount of oxygen utilized by the body during physical activity. One MET is defined as the rate of energy expenditure while at rest, which is approximately 3.5 milliliters of oxygen consumed per kilogram of body weight per minute. This measurement allows for a standard method to compare the intensity of various physical activities in terms of oxygen consumption. For instance, a person engaging in an activity that requires 6 METs is expending energy at six times the resting metabolic rate, indicating a more strenuous level of activity. This framework helps individuals assess fitness levels, gauge exercise intensity, and develop training programs tailored to their goals.

Other options such as measurements of heart rate, body mass index calculations, or body temperature scales do not relate to the specific concept of METs, which is focused solely on energy expenditure and oxygen consumption.