Stand at the bottom of a staircase with feet wider than shoulders. Squat down and, swinging your arms for momentum, jump up two or three stairs, landing softly in a squat for one rep.
Stand at the bottom of a staircase with a slight bend in the knees and feet at shoulder-width. Lean forward to plant your hands a few stairs up, as many as is needed so that your body forms a straight line. Perform a push-up, then press off your hands to assume a squat. Quickly jump up two or three stairs, landing softly with knees bent for one rep.
Start in a high plank with shoulders stacked over wrists, your hands on one stair, and your feet three stairs up. Draw your left knee toward your left elbow, return to start, and repeat on the right side for one rep.
Stand at the bottom of a staircase with feet at shoulder-width. Jump forward and to the left, landing two stairs up on your left foot. Immediately jump straight up and drive your right knee up. Land on your left foot, then repeat on the opposite side for one rep.
Start in a lunge at the bottom of a staircase, with right foot forward, left foot back, and the stairs to your left. Jump to your left, one stair up, switching your leg position mid-air so that you land softly in a lunge with the left foot forward, right foot back. Repeat on the opposite side for one rep. Throughout the move, use your arms for momentum as you would while running.
Get in a high plank at the top of a staircase with the left hand and foot on the top stair and the right hand and foot one stair below. Perform a staggered push-up. Lower your left hand and foot by one stair each, then do the same with the right side for one rep. (You will be one stair lower than you were at the start.)
Photography by Mohamed Sadek. Art direction by Kathryn Marx.