Respuesta :
Warm ups reduce the likelihood of joint and muscle injury as it begins to get the cardiovascular system working and pumps blood throughout the body. Cool downs are necessary because they assist in returning the body to its natural state, they reduce lactic acid levels and gradually bring the heart rate back down.
warm ups warm up your muscles and you can stretch, so you don't get any cramps and your heart rate goes up. cool downs lower you heart rate and calm you down