What constitutes moderate intensity physical activity according to METs?

Moderate intensity physical activity is defined in terms of metabolic equivalents (METs), which quantify the energy expenditure of physical activities. The correct range for moderate intensity physical activity is from 3 to 5.9 METs. This classification is based on the amount of energy expended during activities that elevate the heart rate and breathing but still allow for conversation. Examples of moderate intensity activities include brisk walking, recreational biking, and gardening.

The other ranges provided do not fall within the classification for moderate intensity. Activities that are below 3 METs are generally classified as light intensity, while those at 5.1 METs and above typically represent vigorous intensity activities, where the heart rate significantly increases and the body's demand for oxygen is high. Thus, understanding the MET classification is crucial in promoting appropriate levels of physical activity for health benefits.