Stability ball plank into pike. These are great for your core and this exercise works almost every muscle in your body! Start doing 3 sets of 4 or 5 reps and try to work up to doing 3 sets of 12 reps once you build up your muscle strength:)
Want to change your body in just four minutes? You probably believe it sounds too great to be real. Nevertheless, if you find the strength to do plank every day, you ll get a terrific body, plus a considerable boost in endurance and energy.