Muscles worked
Your standing leg's quads do most of the work, as the knee bends very deeply under your full body weight. Your glutes and inner thigh help you rise, and the outside of your hip keeps knee and pelvis in line. Holding the free leg out in front works the hip flexor and quads on that side. Your ankle needs to bend well too, or the heel lifts before you get deep. The support lets the leg work through the full range long before you manage a free pistol.
Common mistakes
- Your arms pull you up. If you grip too hard, your arms rather than your leg do the work. Hold the support as lightly as you can and use it mostly at the bottom, where it is hardest.
- The free leg drags on the floor. As the leg sinks, its heel catches the floor and stops your depth. Stand on a sturdy box or step so the free leg has room below the edge.
- You collapse at the bottom. Relaxing at the bottom makes it hard to get back up and leaves the knee to take the load. Stay tight the whole way and reverse calmly, a little higher if needed.
Variations and alternatives
- The pistol squat is the goal for many: the same movement with no support.
- The bodyweight Bulgarian split squat lets the back leg share the balance and is easier to build strength in first.
- The chair step-up trains the same leg through a shorter range while the depth is still missing.
Sets and reps
This is hard for most people, so reps stay low: 3 to 4 sets of 3 to 8 reps per leg, with full rest. Stop with one or two reps in reserve rather than grinding up with poor form. The guide to sets and reps explains why low reps and longer rest suit a strength goal.
Here, progress means taking less help: two hands, then one, then a few fingers. A useful step before the free pistol is sitting down onto a chair and standing up on one leg unaided. Note the help you used in each set. That is progressive overload even when the weight stays the same. If you feel pain in the knee, not just effort, stop and have a doctor or physiotherapist examine it.