What is a metabolic equivalent (MET)?

A metabolic equivalent, or MET, is indeed defined as the ratio of a person's energy expenditure while performing an activity to their resting energy expenditure, typically adjusted for their mass. This unit is widely used to quantify the intensity of physical activity and express energy expenditure relative to resting metabolism. For example, 1 MET is equivalent to the energy expended while at rest, while different activities are assigned MET values based on how much more energy they require compared to resting.

This measurement allows health and fitness professionals to estimate the caloric cost of various physical activities and can help in designing exercise programs tailored to individual needs and goals. Understanding MET values can also assist in monitoring exercise intensity in relation to a person's fitness level. It provides a practical framework for evaluating energy expenditure during different forms of exercise and their effectiveness in achieving desired outcomes such as weight loss or cardiovascular improvement.