How to Do a Single-Arm Pushup
Build up to it. Twice a week, do the exercises in the single-arm pushup progression below as a circuit, moving from one to the next with 60 seconds of rest after each move. Do 3 circuits.
1. Elevated Single-Arm
Spread your feet. Put one hand on a bar or tall box. Do 1 to 5 reps, switch arms, repeat.
Each week, do the elevated single-arm pushup slightly lower (so you might progress from a high box to a bench to an aerobic step) until you can do 5 reps on the floor with perfect form.
Lift your left leg. Put your left palm, right fingers, and right knee on the floor. Do 5 reps, switch sides, repeat.
Move one hand farther out to the side than the other. Do 10 reps, switch arms, repeat.