How is vigorous intensity physical activity classified in METs?

Vigorous intensity physical activity is classified as activities that result in considerable increases in heart rate and energy expenditure. The classification uses Metabolic Equivalent of Task (MET) values, where one MET is the rate of energy expenditure while at rest.

The standard classification defines vigorous physical activities as occurring at a MET value of 6 or higher. This means that during vigorous activities, individuals burn at least six times the energy they would at rest. This level of intensity is often associated with activities such as running, competitive sports, or high-intensity interval training, where the effort is significantly greater than in moderate activities.

While other ranges of METs indicate different levels of physical activity intensity—such as moderate physical activities (usually listed in the 3-5.9 MET range)—the designation of vigorous activity starts at 6 METs. Thus, the classification of vigorous intensity physical activity as greater than or equal to 6 METs is accurate and reflects the significant physiological demands placed on the body during such activities.