|HOW: Begin by lying on your back with your knees bent up and your feet flat on the ground. Lift your heels off of the ground while pushing your toes into the ground. From here, continue to push into the ground with your heels floating, while you lift your hips up into the air creating a bridge. Hold that bridge for as long as prescribed and repeat. FEEL: You should feel your calf muscles working as well as your core muscles engaged during the bridge. COMPENSATION: Keep your back flat as you bridge up. Don’t let your heels touch the ground as you bridge up as well.