A full squat on one leg
The other leg is held straight out in front and never touches the floor. It takes ankle range, strength at the bottom, balance and a strong free leg, and coaches find most people are short of one of them.
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Training guide
How to do a pistol squat: the ankles, strength and balance it takes, and the steps to your first one
A pistol squat is a full squat on one leg with the other held straight out in front. It asks for four things at once: enough ankle bend to keep the heel down, strength at the very bottom, balance, and a free leg strong enough to hold itself up. Most people who can't do one are missing one of these, and stiff ankles are a common culprit.
The usual ladder runs from step-downs and skater squats through box, assisted and counterweight pistols to the full one, and every step has a 3D demo below. It comes from coaching practice: no trial has tested it. The full single-leg squat is also one of the heaviest loads on the kneecap of any exercise measured, so there's advice for sore knees.
This guide shows how to find your limit, the technique, the ladder, what the research says about ankles and knees, and how to train it, with an honest timeline (our estimate) and a follow-along progression workout.
The short version
Ankles first
Ankle bend was the factor most strongly linked to squatting deep with the heels down, and more ankle range went with deeper, better-aligned single-leg squats. If your heel lifts, start there.
A heel lift helps
Raising the heels added ankle and knee range in squats across 14 studies. A thin plate under the heel is a fair stopgap while your ankles improve.
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Climb a ladder
Step-downs, split and skater squats, pistols to a box that you lower over time, pistols holding a support, pistols with a light weight held out in front, then the full pistol. This is coaching practice that no trial has tested.
Knees past toes is normal, but the load is high
Your knee has to travel past your toes, and healthy knees adapt to deep squats. But of 35 exercises measured, the full single-leg squat was among the heaviest loads on the joint behind the kneecap, so build up from a box if your kneecaps are sore.
A skill, not the only route to strong legs
Single-leg squats drew more thigh and hip muscle activity than lunges or lateral step-ups in one study, but nothing shows pistols beat split squats or step-ups for building the legs. Our estimate: weeks to learn if you have the ankle range and 20 easy squats, months if you don't.
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What it takes: find your limit
Ankle range: the heel test
Squat as deep as you can with your feet together. If your heels lift before you reach the bottom, ankle range is likely your limit.
For a number, use the knee-to-wall test: in a lunge facing a wall, bend your front knee to touch the wall with the heel down, and move your foot back until you can't; the distance from your big toe to the wall is your score. A change needs to be about 1.6 to 1.9 centimetres to be more than measurement error, and one side clearly stiffer than the other is worth working on.
Strength at the bottom
If you can control a deep two-legged squat but sink or stall at the bottom on one leg, strength is your limit. As a sign you're ready for the one-leg steps, we suggest 20 easy squats with your feet close together.
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Balance
Stand on one leg for 30 seconds without holding on. If you can't, or you fall backwards at the bottom of a box pistol, balance is the limit (our suggested test).
The free leg
Holding a straight leg out in front needs strong hip flexors, the muscles at the front of the hip. If that leg drops or cramps, it is the limit, and coaches add straight-leg raises.
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How to do a pistol squat
Set up
Stand on one leg with the other straight out in front and your arms reaching forward.
Down
Sit down and back until the back of your thigh meets your calf. Keep your standing heel down, and lift the free leg level so it never touches the floor.
The knee
Let your knee travel forward past your toes, in line with your middle toes. Knees past the toes is normal in deep squats; the knee caving inward is the fault to avoid.
The trunk
Lean forward to balance your hips. Some rounding of the lower back at the very bottom is common in a full pistol. Our spine guide explains that rounding hasn't been shown to cause back pain, but there's no need to force it (our suggestion).
Up
Drive back up on the one leg, breathing out as you rise (our suggestion).
Cues
Reach forward as you sit back. Keep the heel heavy. Knee over the middle toes.
Common mistakes
Heel lifting
Ankle range is the main limit to deep heels-down squatting. Use a thin plate under your heel for now, and do knee-to-wall rocks daily.
Falling backwards at the bottom
That's balance, not strength. Reach your arms or a light weight forward, or hold a door frame.
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Knee caving in
A recognised fault. Keep the knee over your middle toes, and go back a step to the skater squat or step-down.
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Dropping or bouncing into the bottom
Momentum hides weakness at the bottom. Lower under control to a box at the depth you can control.
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Rocking off the box
It turns the box pistol into a rocking chair. Pause on the box without relaxing, then stand.
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The free leg drops or cramps
Holding a straight leg out needs hip-flexor strength. Let the free leg hang off a high box for now, and add straight-leg raises or tuck L-sits.
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Training through kneecap pain
A full single-leg squat loads the kneecap joint heavily. Use a pain-free box height, and see our runner's knee guide.
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Get ready: ankles, balance and the free leg
Do the ankle rocks daily and the rest 2 or 3 times a week: 10 slow rocks each side, a minute or two in a deep squat, and 30-second single-leg stands (our starting points).
3D demoKnee-to-wall ankle rockBeginner · A wall
3D demoDeep squat holdIntermediate · No equipment
3D demoHeel-elevated deep squat (slant board squat)Intermediate · A step
3D demoSingle-leg standBeginner · A wall
3D demoBodyweight squatBeginner · No equipment
3D demoStraight-leg raiseBeginner · No equipment
3D demoTuck L-sitIntermediate · No equipmentThe ladder
On the pistol squat itself, use a box behind you, then a support to hold, then a light weight held out in front, before the full version; move on at 8 controlled reps (our editorial rule).
3D demoStep-upBeginner · A step
3D demoSplit squatIntermediate · No equipment
3D demoPatrick step-downIntermediate · A step
3D demoSkater squatAdvanced · No equipment
3D demoRear-foot-elevated split squat (Bulgarian split squat)Intermediate · A bench or box
3D demoPistol squatAdvanced · No equipment
3D demoKettlebell pistol squatAdvanced · A kettlebellWhat the evidence says
Ankle bend limits deep squattingEmerging evidence
In 71 men, ankle bend (dorsiflexion) was the factor most strongly linked to squatting deep with the heels down.
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More ankle range, better single-leg squatsEmerging evidence
People with more ankle range in the knee-to-wall test bent the knee and ankle further in single-leg squats, let the thigh turn in less, and squatted slightly deeper. Hip strength wasn't linked to depth.
Ankle range by ageEmerging evidence
In 899 healthy adults, knee-to-wall range fell with age, especially from the 60s, and was slightly greater in men. A change needs to be about 1.6 to 1.9 centimetres to be more than measurement error.
Heel lifts add ankle and knee rangeEmerging evidence
Across 14 studies, raising the heels increased ankle and knee range in squats, by about 4 degrees at the ankle, and reduced hip and trunk movement as the heel went higher.
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Single-leg squats work the thigh and hip hardEmerging evidence
In 20 adults, the single-leg squat drew more activity in the glutes, a hamstring and the thigh muscles than the forward lunge or the lateral step-up.
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The ladder is coaching practiceEmerging evidence
Box, assisted, counterweight and heel-raised pistols are the usual coaching steps, and NASM, the National Academy of Sports Medicine, teaches that single-leg squat depth should be limited by mobility, stability and control. We found no trial comparing ways of learning the pistol.
Knees
One of the heaviest kneecap loadsEmerging evidence
In a modelling study of 20 healthy adults doing 35 exercises and daily activities, the full single-leg squat was in the highest tier of load on the joint behind the kneecap, a tier whose peaks were 4.5 to 8.2 times body weight. The load on the patellar tendon, below the kneecap, was moderate to high, above the two-legged full squat.
Healthy knees adapt to deep squatsEmerging evidence
A review found fears that deep squats damage healthy knees unfounded; in two-legged squats, pressure behind the kneecap peaks around 90 degrees of knee bend. There are no long-term trials.
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Knees past toes is normalEmerging evidence
A biomechanical review agrees with our knee guide: the knee travels forward past the toes in a deep squat. Our knee guide suggests limiting it for a while if your kneecaps are sore, then building it back.
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If your kneecaps or tendon are sore
Use a box at a height that doesn't hurt, or step-downs and split squats, and see our runner's knee and jumper's knee guides.
How to train it
How often
2 or 3 times a week, not on consecutive days, with the ankle rocks daily (our editorial starting point, in line with our training guides). The coaching source suggests daily practice; we stick with 2 or 3 hard sessions.
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Sets and reps
3 sets of 3 to 8 per leg at your step, stopping 1 to 3 reps short of failure, with 90 seconds to 2 minutes between sides or sets (our editorial starting point).
Progress
Lower the box, use less support, or lighten the counterweight when you reach 8 controlled reps. A heel lift can be added at any step while your ankle range improves.
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How long it takes
No study has timed it. Our estimate: often 4 to 12 weeks if you can already do 20 easy narrow-stance squats, squat deep with your heels down and stand steadily on one leg; several months if your ankle range or strength is limited.
Workouts
The pistol squat progression follows the ladder above; the others build single-leg strength, ankles and balance.
Pistol squat progression
Build to a pistol squat: ankle and balance prep, step-downs, skater squats, box and counterweight pistols, then the full one-leg squat.
25 minIntermediate8 movesA wall, A step
Knee strengthening workout: from first steps to full range
A 25-minute session for knees that don't currently hurt: thigh and hamstring strength, single-leg control, then an optional full-range block with knees over toes.
25 minBeginner13 movesA bench or box, A wall
Foot and ankle strengthening routine: toes, arches, calves and balance
A 15-minute barefoot routine for stronger toes, arches, calves and ankles, finishing with balance. You need only a towel, a wall and a resistance band.
15 minBeginner11 movesA wall, Other / check instructions
Balance exercises routine
Balance practice in 10 minutes: tandem stance, single-leg stands, marches, heel walks, tree pose and floor transfers.
10 minBeginner7 movesA wall, A bench or box
Dumbbell leg workout B: single-leg and hinge
Dumbbell leg workout B: Bulgarian split squats, single-leg Romanian deadlifts, slider curls, single-leg bridges, calf raises and suitcase carries.
45 minIntermediate12 movesA bench or box, A dumbbell
Advanced calisthenics workout
An advanced bodyweight strength session: pull-ups, dips, pistol squats, archer push-ups, L-sits and Nordic curls.
45 minAdvanced9 movesPull-up bar, An anchor pointBeyond the pistol
The shrimp squat holds the free leg behind you and is a different, harder single-leg squat; the Smith machine version steadies you so you can add load.
Who should modify, and warning signs
Knee replacement, meniscus or ACL problems
Follow your surgical or physiotherapy team's limits, and see our knee replacement, meniscus tear and ACL (anterior cruciate ligament) injury guides.
Hip arthritis or a pinch at the front of the hip
Deep hip bending may pinch. Use a higher box.
Stiff ankle after a sprain or break
Use knee-to-wall rocks and a heel lift, and see our ankle guides.
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Poor balance or a high risk of falling
Always hold a support (our suggestion).
Contact NHS 111
If your knee is very painful, you can't move it or put weight on it, it is badly swollen or has changed shape, it locks or gives way, or it is red and hot and you have a high temperature. In the US, use urgent care.
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See a GP
If knee pain doesn't improve within a few weeks.
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Myths
"Pistols wreck your knees"Mixed evidence
Healthy knees tolerate deep squats, but the full single-leg squat is among the heaviest kneecap loads measured. People with kneecap pain should build up from a box.
"Your knees must never pass your toes"Emerging evidence
Knees past the toes is normal and needed for depth in a squat, and a pistol can't be done without it.
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"If you can't do a pistol, your legs are weak"Emerging evidence
Ankle range often limits deep squatting, and balance and free-leg strength matter too. Check your heel and the knee-to-wall test first.
"The pistol is the best leg exercise"Emerging evidence
Single-leg squats draw high thigh and hip muscle activity, but no trial shows pistols beat loaded split squats or step-ups. Do them for the skill.
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Read next
Questions people ask
Why can't I do a pistol squat?
Usually it's one of four things: ankle range (your heel lifts), strength at the very bottom, balance (you fall backwards), or the strength to hold the free leg up. Find yours and train that step.
Is ankle mobility stopping my pistol squat?
Often. Ankle bend was the factor most strongly linked to squatting deep with the heels down. Try the knee-to-wall test: if your heel lifts in a deep squat or one side is clearly stiffer, work on it daily and use a small heel lift meanwhile.
Are pistol squats bad for your knees?
Not for healthy knees, which adapt to deep squatting. But the full single-leg squat is one of the heaviest loads on the kneecap of 35 exercises measured, so with kneecap pain, squat to a box at a height that doesn't hurt.
Is it OK for my knee to go past my toes?
Yes. A pistol needs it, and it's normal in deep squats. Keep the knee in line with your middle toes rather than letting it cave in.
Should I start with box pistols or assisted pistols?
Coaches use both, and we found no study comparing them. A box teaches control at a set depth, and holding a support helps if balance is the problem, so use whichever fixes your limit.
Does holding a weight make a pistol squat easier?
It can. A light weight held out in front acts as a counterweight and helps you sit back without tipping over. Reduce it as you improve.
What muscles does a pistol squat work?
Mainly the quadriceps and glutes, with the hamstrings and the side-hip muscles. In one study, single-leg squats drew more thigh and hip muscle activity than lunges or lateral step-ups.
Do I need pistol squats for strong legs?
No. Nothing shows they beat split squats or step-ups for building the legs. Do them if you want the skill.
How many sets and reps of pistol squats should I do?
Our starting point: 3 sets of 3 to 8 per leg at your step, 2 or 3 times a week, stopping a rep or two short of failure. Move on to the next step when you reach 8 controlled reps.
How long does it take to learn a pistol squat?
No study has timed it. Our estimate: 4 to 12 weeks if you can do 20 easy narrow-stance squats with your heels down and stand steadily on one leg, and several months if not.
Can older adults do pistol squats?
Some can, but it isn't needed: sit-to-stands, step-ups and balance work build the same qualities with less risk of a fall (our view), and our guide to exercise for older adults has a plan. If you try pistols, hold a support and use a box.
Sources
- Breaking Muscle 2022 · What's preventing you from doing pistol squats? How to progress pistols (coaching article)
- Kasuyama 2009 · Ankle bend and the deep squat in 71 men (study, J Phys Ther Sci)
- Dill 2014 · Limited ankle bend and knee and ankle movement in squats (study, J Athl Train)
- da Costa 2021 · Ankle bend and movement in the single-leg squat (study, Gait Posture)
- Ghasemi 2026 · Heel elevation and ankle and knee range in squats: 14 studies (systematic review and meta-analysis, Sports Biomech)
- National Academy of Sports Medicine · Single-leg squat (exercise library)
- Straub 2024 · The squat: a biomechanical review for clinical practice (review, Int J Sports Phys Ther)
- Hartmann 2013 · Knee and spine load with squat depth and weight (review, Sports Medicine)
- Song 2023 · Kneecap joint load across 35 exercises and daily activities in 20 adults (modelling study, Am J Sports Med)
- Muyor 2020 · Muscle activity in the one-leg squat, forward lunge and lateral step-up in 20 adults (EMG study, PLoS One)
- McBride 2026 · Knee-to-wall test values by age and sex in 899 adults (study, Musculoskelet Sci Pract)
- Powden 2015 · Reliability of the knee-to-wall (weight-bearing lunge) test (systematic review, Man Ther)
- Walker 2026 · Single-leg squat movement, hip strength and ankle bend (3D motion study, Int J Exerc Sci)
- Scattone Silva 2024 · Patellar tendon load across rehabilitation exercises (modelling study, MSSE)
- NHS · Knee pain
Exercise education, not a personal prescription, and clinical review of these guides is pending. Check with a GP before starting hard training if you have a heart condition, chest pain, dizziness or breathlessness when active, and stop for sharp or increasing pain. Health disclaimer.