Why do you cool down after exercising?

Cooling down, also called warming down, is the term used to describe an easy exercise that will allow the body to gradually transition from an exertion state to a resting or near-resting state. Depending on the intensity of the exercise, cooling down can involve a slow jog or walk, or with lower intensities, stretching can be used. Cooling down helps remove lactic acid which can cause cramps and stiffness and allows the heart rate to return to its resting rate. Contrary to popular belief, cool down does not appear to reduce delayed-onset muscle soreness.

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