HOW: Begin by lying on your back with your knees bent up and your feet flat on the ground about shoulder width apart. Push into the ground with your feet lifting your hips as high as you can flexing your glutes and engaging your core muscles. At the top of the bridge, push your toes into the ground and raise your heels up and down, then release back to the starting position. FEEL: You should feel your core, glutes, and calf muscles working. COMPENSATION: Don’t raise your heels up until the end of the bridge. Exercise Library