Active listening, good posture.
Answer:
Did you ever gwt an answer i need help with this same question
Explanation:
A warm up consist of a period of non-strenuous activity that slowly prepares the body for more vigorous exercise.
Most warm up will gradually increase in intensity. The muscle which was used can be different for each activity. <span>Not only athlete, </span>singer can do warm up too.
I think It would be somatotropin ( growth hormone)
