Hamstring Curl
Stand in front of the stairs and place your left hand on the railing for balance. Extend your right leg behind you and lift your toes a few inches off the ground. From here, bend your leg, slowly bringing that heel toward your butt, keeping your hips level. Straighten your leg and uncurl back to the starting position. Do 10 repetitions on each leg, repeating the sequence for one minute. (11:00-12:00 minutes)
NextStair Sprint
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