It's tough to stay alert in classes all day, do stuff after school, see your friends, and get through all your homework at night. Who has time to add physical activity to this list? It’s a weird but true fact: being active actually helps you feel more awake and have the energy to do all the things you want to do every day. Activity helps you feel better, stay alert, and deal with stress. Plus, it helps you sleep better—so you’ve tackled two parts of the energy equation at once.