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.
GUEST POST: Strength coach, researcher, and shoulder guru Eric Cressey details some of the most common problems facing the body's most complex joint, and how to address them. Learn how to bulletproof your shoulders and exercise smarter today.