Barbell Squat
The barbell squat, also called the back squat, is the classic lower-body lift: with a bar across your upper back, you sit down between your heels and stand back up. It trains the quads and glutes most, with the adductors and your trunk working hard alongside, and it is the standard test of leg strength.
How to do the barbell squat
Set the bar in the rack at mid-chest height, step under it and rest it on your upper traps, below the bony point at the base of your neck.
Grip the bar just outside your shoulders, pull your elbows down and squeeze your upper back tight.
Stand up to unrack, take two or three short steps back and set your feet about shoulder width apart, toes turned out a little.
Breathe deep into your belly, brace your midsection and start down by bending hips and knees together.
Sit down between your heels, knees moving out over your toes, until your hip crease is at least level with your knees.
Push the floor away through your whole foot, chest and hips rising together, until you stand tall.
Breathe out at the top, take a new breath, brace again and start the next rep.
Setup in the rack
Set the hooks so you unrack with slightly bent knees, never on your toes, and the safety bars a few centimetres below your lowest point. If a rep fails, you sit the bar down on them and step out. Walk out in as few steps as you can: one back with each foot and a small one to adjust.
Bar position: high bar or low bar
In the high-bar squat the bar sits on the upper traps; you stay fairly upright and the quads work more. In the low-bar squat it rests a few centimetres lower, across the rear delts; you lean further forward and the hips take more of the load. Pick the one that feels secure and stay with it so your numbers stay comparable.
Foot position and stance width
Start with your heels about shoulder width apart and your toes turned out a little. Long thighs or stiff hips often squat deeper with a wider stance and more toe-out. Whatever the stance, your knees follow your toes and the pressure stays in the middle of the foot.
Breathing and bracing
Breathe into your belly, not your chest, and tighten your midsection as if someone were about to push you. Hold that pressure down and through the bottom, and breathe out past the hardest point. A belt gives your trunk something to brace against on heavy sets; it does not replace the brace.
Depth: how low to squat
A full barbell squat goes down until the hip crease is at least level with the top of the knee, deeper if your back stays neutral and your heels stay down. Depth pays: in one 12-week study, deep squats built more front-thigh muscle than shallow ones, and in another, full squats grew the glutes and adductors more than half squats. If you cannot reach depth yet, lighten the load before you cut the range.
Tempo and bar path
Lower the bar under control, then drive up with intent. The bar should travel in a straight vertical line over mid-foot; if it drifts forward, you are shifting onto your toes or letting your chest drop.
Muscles worked by the barbell squat
- Primary
- Quads
- Glutes
- Secondary
- Adductors
- Lower back
- Abs
- Obliques
The quads straighten your knees and do most of the work out of the bottom; the glutes extend your hips and work hardest in the deep part of the squat. The adductors on the inner thigh help extend the hips too: in a 10-week study, full squats grew the glutes and adductors more than half squats. The hamstrings steady the hips and knees but did not grow in that study, so they need their own exercise. Your lower back, abs and obliques keep the trunk stiff so the bar stays over your feet.
Common squat mistakes
Knees caving in
When the knees drift toward each other on the way up, the hips stop doing their share and the knees leave their line. Let your knees track over your toes the whole way.
Stopping too high
Half squats let you lift more but build less glute and adductor muscle. Go until your hip crease is at least level with your knees; full squats built more glute and adductor muscle in a controlled study.
Heels coming off the floor
Rising onto the toes pushes the bar forward and costs balance. Keep the weight over mid-foot; a slightly wider stance or lifting shoes with a raised heel help stiff ankles.
Hips shooting up first
If your hips rise faster than your shoulders, the squat turns into a good morning and the lower back takes over. Lead with your chest and push your upper back into the bar.
Losing the brace at the bottom
Letting the air out in the hole lets the lower back round under load. Hold your breath through the hardest part and only go as deep as you can keep your back neutral.
Squat tips from the Muscla training logic
- Warm up with two ramp sets before your first working set: about 50 % of your working weight for 8 reps, then about 75 % for 3.
- End each working set with about two reps in the tank, two to three when you train for strength. After your last set Muscla asks “How heavy was that?” and plans your next session from the answer.
- Rest 3 minutes between sets for strength, 2 minutes for muscle and 90 seconds otherwise. In trained men, 3-minute rests built more front-thigh muscle and squat strength than 1-minute rests.
- Add weight once every set reaches the top of your rep range. Muscla steps lower-body lifts by about 5 %, rounded to your plates: at 100 kg the next step is 105 kg.
- After every third 4-week block, take a deload week at 90 % of the weight with one set fewer, then carry on where you left off.
Barbell squat sets and reps by goal
| Goal | Reps | Rest |
|---|---|---|
| Strength | 3–6 → 2–5 → 4–8 | 3 min |
| Muscle | 6–10 → 8–12 | 2 min |
| Lose fat | 6–12 | 90 s |
| Fit | 8–12 | 90 s |
| Comeback | 8–12 | 90 s |
An arrow marks the range for the next 4-week block.
The ranges come from the Muscla training logic for heavy compound lifts like the barbell squat. Pick the row for your goal; the arrows show how the range moves from one 4-week block to the next. Heavy lifts like the squat come first in a session, and Muscla never puts two squat variations on the same day.
Estimate your squat one-rep max
Filled in with example values. Replace them with yours.
Estimated 1RM
Brzycki 112.5 · Lombardi 117.5
Epley: 100 × (1 + 5 ÷ 30) = 116.7 kg
Load 117.5 kg on the bar →| Reps | Weight | % of 1RM |
|---|---|---|
| 1 | 117.5 kg | 100 % |
| 2 | 110 kg | 94 % |
| 3 | 105 kg | 91 % |
| 4 | 102.5 kg | 88 % |
| 5 | 100 kg | 86 % |
| 6 | 97.5 kg | 83 % |
| 7 | 95 kg | 81 % |
| 8 | 92.5 kg | 79 % |
| 9 | 90 kg | 77 % |
| 10 | 87.5 kg | 75 % |
| 11 | 85 kg | 73 % |
| 12 | 82.5 kg | 71 % |
Squat strength standards
| Level | Men | Women |
|---|---|---|
| Beginner | under × 1 | under × 0.75 |
| Advanced | × 1 | × 0.75 |
| Strong | × 1.5 | × 1 |
| Very strong | × 2 | × 1.5 |
| Elite | × 2.5 | × 2 |
Estimated one-rep max as a multiple of body weight, where each level starts. The same in kg and lb.
Barbell squat alternatives
- Hack Squat
- Leg Press
- Dumbbell Goblet Squat
- Kettlebell goblet squat
- Smith squat
- Dumbbell squat
- Dumbbell bench squat
- Barbell Front Squat
- Band squat
- Squat to overhead reach
Barbell squat questions
Is it okay if my knees go past my toes when I squat?
Yes. Your knees have to travel forward for your hips to sit down between your heels. Holding them back makes you lean further forward and shifts load onto the hips and lower back.
How deep should you squat?
At least until your hip crease is level with your knees, and deeper if your back stays neutral. In training studies, deep squats built more front-thigh muscle than quarter squats and more glute and adductor muscle than half squats.
Are deep squats bad for your knees?
A review of the research found no higher risk for the knee joint from deep squats when the technique is learned well and the load rises step by step. Sharp pain is still a reason to stop and adjust.
How much should I be able to squat?
In the Muscla strength table, men count as advanced from a one-rep max of 1 times body weight and as strong from 1.5 times. For women these levels start at 0.75 and 1 times body weight.
Should beginners do barbell squats?
Muscla starts new lifters in the gym on the leg press and brings in the barbell squat once their level fits. Goblet squats with a dumbbell are a good way to learn the pattern first.
Train it with Muscla
Muscla plans your sets and reps, sets the next weight after every session and shows your estimated 1RM and strength level for each lift.
Coming to the App Store. Free to start.
Sources
- Kubo K, Ikebukuro T, Yata H. Effects of squat training with different depths on lower limb muscle volumes. Eur J Appl Physiol. 2019;119(9):1933-1942. PubMed
- Bloomquist K, Langberg H, Karlsen S, et al. Effect of range of motion in heavy load squatting on muscle and tendon adaptations. Eur J Appl Physiol. 2013;113(8):2133-2142. PubMed
- Hartmann H, Wirth K, Klusemann M. Analysis of the load on the knee joint and vertebral column with changes in squatting depth and weight load. Sports Med. 2013;43(10):993-1008. PubMed
- Schoenfeld BJ. Squatting kinematics and kinetics and their application to exercise performance. J Strength Cond Res. 2010;24(12):3497-3506. PubMed
- Schoenfeld BJ, Pope ZK, Benik FM, et al. Longer interset rest periods enhance muscle strength and hypertrophy in resistance-trained men. J Strength Cond Res. 2016;30(7):1805-1812. PubMed