Answer:
It keeps blood from pooling in the limbs.
Step-by-step explanation:
Blood pooling may be defined as the condition where there is blood gathering or 'pooling' in the veins of limbs and legs. It results due to rush of blood in the veins when the body temperature rises and heart beat increases.
When we exercise our body temperature increases and the blood flow increases in the body. So the body temperature has to come down. Hence cooling down is very essential after cooling. It also helps to improve the physical fitness and reduces the HR.