Answer:
It prepares your muscles and heart to move from inactivity to moderate or heavy activity and prepares your body and mind for the hard training head then, to allow the body to settle down and unwind.
Explanation:
To calm down your body you need to be relaxed, if you don't have any ways to calm down you can drink some cool water while resting on your bed or couch, you could also try doing stretches after a workout or anything else that could make you not calm.
