Answer: Before every exercise, you should always do a warm up. A warm up is when you start at a low level of intensity before an exercise. Doing that helps minimize injury and it follows the principle of progression. After an exercise, you should always do a cool down. A cool down is when you go from a high intensity exercise, to a low intensity exercise. Cool down also prevent injury and stabilize your muscle. In conclusion, cool downs and warm ups are very important because it helps prevent injuries.