Why is cool-down an important part of aerobic activity?
After any aerobic activity, the blood is pooled in the extremities, and the heart rate is elevated. The purpose of the cool-down is to bring the heart rate down to near-resting level and to facilitate blood circulation back to the heart. Stopping abruptly could result in fainting or place undue stress on the heart. The cool-down should also include stretching to help relax the muscles and increase flexibility.
