Begin sitting on the first step with your hands on either side of you, shoulder-width apart and flat on the stair. Your fingertips should be right on the edge or slightly off the stair, pointing forward. Place your feet hip-width apart about two to three feet from the bottom step, knees bent and balanced on your heels with your toes pointed up.
Slide your butt forward until it's just off the step. Keep your arms straight but not locked.
Bend your elbows with control and lower your body toward the floor, until your elbows are at about a 90-degree angle but no lower. Your elbows should be pointed straight behind you, close to your ribs. Keep your core tight and hips lifted. The downward movement should initiate from your arms, keeping your hips stable and lifted.
Drive through your hands and slowly push back up until your arms are straight. This counts as one rep.
Complete for two sets of 10 to 12 reps, resting for 45 seconds between sets.