I think the answer is it prepares your body for necessary action because I learned something like anxiety and how it help you take action last year. I hope this helps you.
Answer:
I know this but the way your asking is confusing me but I were ould say 1 in 3 to one and 4
You should spend 5 - 10 minutes on the warm up and cool down.
Hope This Helps You!
<span>Good Luck Studying :)</span>
If the ball hits the net on the serve but then goes into the proper service box, it is called a Let