How to Do It
- Set the bar in a rack at roughly chest height. Step under it and rest the bar across your upper traps (high-bar) or rear delts (low-bar), not directly on your neck.
- Grip the bar just outside shoulder width, unrack it, and take two or three steps back into your stance, feet shoulder-width apart with toes turned slightly out.
- Brace your core by taking a deep breath into your belly, then initiate the squat by pushing your hips back and bending your knees together.
- Descend until your hip crease drops below your knee (at least parallel), keeping your chest up and knees tracking over your toes.
- Drive through the middle of your foot to stand back up, exhaling as you pass the hardest part of the rep.
Common Mistakes
- Knees caving inward on the way up, usually from weak glutes or going too heavy too soon.
- Losing the neutral spine and rounding the lower back at the bottom of the squat.
- Rising onto the toes instead of driving through the whole foot, which shifts load off the glutes and onto the knees.
- Not hitting depth consistently, which shortchanges the quads and glutes of their full range of motion.
The back squat is the standard barbell exercise for building total lower body strength and size. It loads the quads, glutes, hamstrings, and core simultaneously, and the strength you build here carries over to almost every other lift and athletic movement.
Depth matters more than most lifters realize. A quarter squat with a heavy bar builds less muscle and strength than a full-depth squat with a lighter one, because the muscles never get loaded through their full range. Chase depth before you chase weight.
If you’re building a full lower body session around this movement, pair it with a hip hinge (like the Romanian deadlift) and a single-leg movement to cover all the angles your legs need. New lifters who aren’t ready for a barbell should learn the pattern first with a goblet squat.
Back Squat vs Front Squat
Both squats train the same muscles through the same basic pattern, but bar position changes the demand. The back squat rests the bar across your upper traps or rear delts, letting your torso lean forward more and load the posterior chain harder, which is why it’s usually the heavier lift for a given lifter. The front squat racks the bar across your front delts and collarbone, which forces a more upright torso, shortens the range your hips travel back, and shifts more emphasis onto the quads and core.
| Back Squat | Front Squat | |
|---|---|---|
| Bar position | Upper traps or rear delts | Front delts and collarbone |
| Torso angle | More forward lean | More upright |
| Loading potential | Higher | Lower, limited by rack position |
| Emphasis | Glutes, hamstrings, quads | Quads, core |
Most strength programs build around the back squat and use the front squat as an accessory to reinforce upright posture and quad strength.[1][2]
Muscles Worked by the Barbell Back Squat
- Primary: quadriceps, glutes
- Secondary: hamstrings, adductors
- Stabilizers: core and lower back, bracing hard to keep the spine neutral under load[1][2]
Heels-Elevated Setup & Quad-Focus Levers
A heel-elevated back squat is not a separate exercise; it’s the same lift with a small wedge or a plate under the heels. Elevating the heels reduces how much ankle dorsiflexion the squat demands, which lets the knees travel further forward before the heels lift, increasing knee flexion at a given depth and shifting more of the work onto the quadriceps.
Setting it up:
- Use a purpose-built squat wedge or two stacked weight plates, one for each heel. Plates should be flat, stable, and identical on both sides; do not stack mismatched or rounded plates that can tip.
- Stand with heels on the elevation and toes on the floor. Test an unloaded squat first: the torso should sit more upright than your usual flat-footed depth, with less forward lean needed to keep the bar over the midfoot.
- Keep the same stance width you already use, or narrow it slightly. A wider stance combined with heel elevation can crowd the hips and reduce the range benefit.
- Start with a lighter load than your flat-footed working weight. The changed torso angle and knee position change the rep even if the bar weight looks familiar.[1][2]
What it costs you: a more upright torso and greater knee travel reduce hip and posterior-chain involvement relative to a flat-footed squat, so heel elevation is a trade, not a straight upgrade. If your heels lift under normal footwear at your working depth, that’s a signal to address ankle mobility directly rather than making elevation a permanent workaround; see ankle mobility for squats for a mobility-first approach.
Quad-focus levers, ranked by effect size:
- Bar position — a higher bar (closer to the traps) keeps the torso more upright and biases the quads over a low-bar setup, without any equipment change.
- Stance width — a narrower stance increases knee flexion relative to hip flexion at the same depth, shifting more of the moment to the knees.
- Heel elevation — see above; a smaller, more equipment-dependent lever than bar position or stance.
- Depth — a deeper squat increases total range and glute involvement; a shallower squat within a controlled range biases the quads’ strongest length range.
- Tempo — a slower descent under a quad-biased setup increases time under tension for the knee extensors without changing the setup itself.
Stack these levers rather than chasing one in isolation. Bar position and stance changes are free; heel elevation and tempo are additive refinements once the first two are set.
Barbell Back Squat Alternatives
- Goblet squat: a lighter, front-loaded regression that’s easier to learn depth and bracing with before adding a barbell.
- Front squat: shifts more of the load onto the quads and core with a more upright torso.[1][2]
- Bulgarian split squat: a single-leg alternative that adds a balance demand and trains each leg independently.
- Leg press: a machine substitute that removes the balance and bracing demand, useful for pushing the quads and glutes hard without spinal loading.
If a rack, a barbell, or the spinal loading itself is the reason the back squat is off the table entirely rather than something to adjust, see back squat alternatives for a constraint-first substitution guide.
Rack and Bar-Position Calibration
Set the J-hooks so the bar clears the rack without a calf raise or a deep knee bend. If you use safety pins, set them just below the lowest point you can reach with the intended stance and load; test the empty bar before working. Take the same short walkout every set: stand tall, unlock the bar, step back once, then make one small stance adjustment if needed. More steps create more opportunities to lose balance under fatigue.
High-bar and low-bar positions are choices, not grades. A high-bar position usually supports a more upright squat and may suit a lifter who wants a strong knee-bend pattern. A low-bar position places the bar lower across the rear delts and may suit a lifter who is comfortable with more hip contribution. Choose the position that lets you keep the bar over the middle of the foot, use a repeatable depth, and finish reps without shoulder or wrist irritation. The front squat and goblet squat pages cover different bar positions and regressions rather than being compulsory stages.
Find Your Working Depth
Do not force every lifter into an identical stance width or depth. Use an unloaded squat or a light goblet squat to find a depth where the pelvis, spine, knees, and feet remain controlled. Film from the side and from a front-quarter angle. The useful test is whether the same bottom position can be repeated at the planned load without the heels lifting, knees collapsing, or the trunk losing control. If depth changes dramatically between warm-up and work sets, reduce load and treat the shallowest consistent position as today’s reference.
Common faults are observations, not diagnoses. A forward torso angle can be a normal result of bar position; it becomes a problem when the bar drifts away from the foot or the lifter cannot stand without changing position. Knees moving inward under fatigue may be a load or stance issue; first reduce the load, slow the descent, or widen the stance slightly before labeling a muscle as “weak.” A qualified coach or clinician should assess persistent pain, numbness, or loss of control.
Rep-Quality Progression Log
Use a double-progression range such as 3–4 sets of 5–8 reps. Keep one to three technically sound reps in reserve and add a small amount of load only after all sets reach the top of the range at the same depth. Log load, reps, depth consistency, first fault, and effort:
| Session | Load | Work sets | Depth / bar path | Next step |
|---|---|---|---|---|
| 1 | 60 kg | 4 × 5 | consistent | repeat |
| 2 | 60 kg | 4 × 7 | last rep slows | add one rep next time |
| 3 | 60 kg | 4 × 8 | consistent | add 2.5 kg |
If the first fault is a heel lift, use a stance and ankle-mobility regression or a heel-elevated variation while keeping the range pain-free. If the fault is losing the brace, use a lighter goblet squat or paused bodyweight squat. If the rack is unavailable, a Bulgarian split squat can train the legs unilaterally, but it is an alternative rather than a direct technical substitute. Pair the squat with a Romanian deadlift when you want a balanced lower-body session.
Regressions
- Goblet Squat: Front loading can make depth and bracing easier to learn.
Alternatives
- Split Squat: A unilateral lower-body alternative when a rack is unavailable.
Programs Using This Exercise
References
- Anaerobic and Muscle Endurance Development: Lifting Guidelines. National Strength and Conditioning Association (2017)Back to claim
- American College of Sports Medicine Position Stand. Resistance Training Prescription for Muscle Function, Hypertrophy, and Physical Performance in Healthy Adults: An Overview of Reviews. Medicine & Science in Sports & Exercise (2026)Back to claim
- Updating ACSM's Recommendations for Exercise Preparticipation Health Screening. Medicine & Science in Sports & Exercise (2015)Back to claim
See our exercise methodology for how this evidence is applied and its limits.
Frequently Asked Questions
- How to do back squats correctly?
- To do a back squat correctly, rest the bar across your upper traps or rear delts, unrack it, and step back into a shoulder-width stance with toes turned slightly out. Brace your core, push your hips back, and descend until your hip crease drops below your knee, keeping your chest up before driving through the middle of your foot to stand back up.
- Is a barbell back squat good?
- Yes, the barbell back squat is one of the best exercises for building total lower-body strength and size, loading the quads, glutes, hamstrings, and core simultaneously. The strength you build carries over to almost every other lift and athletic movement, which is why it anchors most well-designed strength programs.
- What is the difference between a back squat and a regular squat?
- A back squat specifically refers to squatting with a barbell loaded across your upper back, either high-bar on the traps or low-bar on the rear delts, while a regular squat can mean any squat variation, including bodyweight or front-loaded versions. The back squat allows the heaviest loading of the common squat variations.
- What are common back squat mistakes?
- Common back squat mistakes include knees caving inward on the way up, usually from weak glutes or going too heavy too soon, losing the neutral spine and rounding the lower back at the bottom, rising onto the toes instead of driving through the whole foot, and not hitting consistent depth, which shortchanges the quads and glutes.
- What does a bar back squat work?
- The barbell back squat works the quadriceps, glutes, and hamstrings as the primary movers, with the core bracing hard throughout to stabilize the spine under load. It trains more total lower-body muscle mass in one movement than almost any other exercise, which is why it is considered a foundational strength lift.
- Back squat vs front squat: what's the difference?
- The back squat loads the bar across your upper traps or rear delts, allowing the heaviest loading and the most total posterior-chain involvement. The front squat racks the bar across your front delts and collarbone, forcing a more upright torso that shifts emphasis onto the quads and core while reducing lower-back shear. Most lifters can back squat more weight than they can front squat.