Before they start their workouts and after
Answer:
As you exercise, your body expends more oxygen. So, your body while require more oxygen circulating throughout your body in order to make sure all of your muscles are adequatley oxygenated.
Explanation:
I think it's D. Because the students impulse is to do it because its cool, because all their friends do it. Hope my answer helps you! :)
It contains 4 calories
Answer: D
