3. Walking Plank
If you've never tried this exercise before, then you can start on your hands and knees with your feet up in the air. Then you should move your hands to the right and then to the left. Every time that you place your body into a new position, you can do pushups. Once you get used to this exercise, then you can try it again without touching your knees to the ground. You'll touch your toes to the ground, instead.