Lie with your stomach on the floor to do push-ups. Your toes should support your feet upright. Place your hands palms-down under your shoulders. Push up with your arms, straightening your elbows, keeping your legs and back straight, staring straight ahead. Lower yourself as far as you can while still keeping your body straight, almost parallel to the floor.
Beginners or others with less upper body strength can do a half push-up, keeping your knees on the floor instead of your toes. Keep your back straight, parallel to the floor, at the starting position. This exercise works the shoulders, triceps and ab muscles.