Here are 9 simple exercises you can do in school that will help you to be physically and mentally healthy. Water Bottle Curls. Works your: Biceps. ... Tricep Dips. Works your: Triceps. ... Sitting Arm Stretching. Works your: Arms and abdominal muscles. ... Wide Arm Stretching. ... Chair Squats. ... Shoulder Shrugs. ... Seated Leg Raise. ... Floor Push-ups. More items...