Barbell Back Squat — Proper Form Guide

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Exercise Type

A compound, lower-body exercise that works the hips and knees together. Both legs move at once under a free-weight barbell, so it builds leg and hip strength while training your trunk to stay rigid under load.

Compound Lower-body Knee & hip dominant Free weight Strength & hypertrophy

Equipment: Barbell, squat rack, plates
Level: Beginner → Advanced
Rep range: 5–8 reps (strength) · 8–12 (size) × 3–5 sets
Tempo: 2.5 s down · 0.5 s hold · 2 s up

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Starting Position

Set the bar in the rack at about mid-chest height. Step under it and rest it across your upper back, on the trapezius just below the neck (not on the neck itself).
Grip the bar just outside your shoulders with elbows pointing down and slightly back. Squeeze your shoulder blades together to make a firm "shelf" for the bar.
Stand up to lift the bar off the hooks, take two or three short steps back, set your feet and stand tall — chest up, eyes forward, bar over the middle of your feet.

Side view — standing tall with the bar on the upper back

One rep ≈ 6 s · red glow = thighs & hips working · dashed line = mid-foot

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Movement

Breathe in and brace, then push your hips back and bend your knees at the same time. Lower under control, keeping your chest up and the bar travelling straight down over the mid-foot.
Let your knees travel forward and out in line with your toes. Keep your heels flat and your back neutral all the way down.
Pause briefly at depth, then drive up through your whole foot. Hips and shoulders should rise at the same speed until you are standing tall again.

Set · 1 s

Down · 2.5 s

Hold · 0.5 s

Up · 2 s

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End Position

At the bottom of the rep your thighs are at least parallel to the floor — the crease of your hip level with, or just below, the top of your knee (go only as deep as you can with a neutral back).
Your torso leans forward but your back stays flat, not rounded, and the bar is still directly above the middle of your feet.
Heels stay down, knees are pushed out over the toes, and your core is still braced.

Side view — the bottom of the squat, thighs parallel to the floor

Front view

Feet from above

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Leg Position

Stand with your feet about shoulder-width apart (slightly wider is fine) and your toes turned out about 15–30°.
Spread your weight over the whole foot — heel, big toe and little toe — and keep your heels on the floor throughout.
Your knees should follow the line of your toes. Push them gently outward and never let them cave inward as you lower or stand up.

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Breathing

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Breathe In

Breathe in deeply at the top, before you start to lower. Breathe "into your belly" and tighten your abs as if bracing for a punch — this pressure supports your spine under the bar.

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Hold

Hold that breath as you lower and through the bottom of the squat, until you are past the hardest part of the way up (about halfway). If you have high blood pressure or a heart condition, don’t hold your breath — breathe out steadily as you stand up, and check with your doctor first.

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Breathe Out

Breathe out as you drive up, once you are past the halfway point, finishing the exhale as you stand tall. Take a fresh breath and re-brace at the top before every rep.

TopBottomHalfway upTop

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Between Sets

Rack the bar safely: walk forward until it touches the uprights, then bend your knees slightly to set it into both hooks before you step out.

Rest 2–5 minutes after heavy sets of 5 or fewer reps, or 90–120 seconds for sets of 8–12. Walk around, breathe and sip water rather than sitting still.

Keep your legs loose with gentle hip and ankle movement, check that the collars are tight, and run through your setup cues before the next set.

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Major Muscles Exercised

Front
Front · thigh

Quadriceps
Front of the thigh — straightens the knee as you stand up
Back
Back · buttocks

Gluteus maximus
Buttocks — extends the hip, driving you out of the bottom
Front
Front · inner thigh

Adductor magnus
Inner thigh — helps extend the hip, especially in deep squats

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Minor Muscles Exercised

Back
Back · thigh

Hamstrings
Assist hip extension and stabilise the knee
Back
Back · either side of the spine

Erector spinae
Keep the back straight under the bar
Back
Back · upper outer hip

Gluteus medius & minimus
Stop the knees from caving inward
Back
Back · lower leg

Calves (gastrocnemius, soleus)
Steady the ankles and lower legs
Front
Front · abdomen

Core (abs, obliques)
Brace the trunk to protect the spine
Back
Back · upper back

Upper back (trapezius & rhomboids)
Hold the bar firmly in place

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Joints

Joint	Action during the squat
Hip	Flexion while lowering, extension while standing up
Knee	Flexion while lowering, extension while standing up
Ankle	Dorsiflexion as the knees travel forward over the toes
Spine (lumbar & thoracic)	Held neutral and still — braced, not moving
Shoulder	Held in place, rotated outward to secure the bar

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Closest Variation: Front Squat

The one difference

The bar rests on the front of your shoulders instead of across your upper back.

Back squat — bottom

Front squat — bottom

What that changes — compared with the back squat

Load you can lift

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Most lifters front squat noticeably less than they back squat.
Main muscle emphasis

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More work for the quadriceps and upper back; the glutes and lower back do a little less.
Joint & spine stress

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The upright torso eases the load on the lower back, but holding the bar needs good wrist, elbow and upper-back mobility.
Difficulty to learn

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The front-rack bar position takes practice, and the bar rolls forward if your elbows drop.

About the same: range of motion, balance & stability demand, grip demand.

Role: Lateral· Similar difficulty

Choose the front squat if…

✓You want to bias the quadriceps
✓Your lower back gets tired before your legs
✓You do Olympic lifting or want a more upright squat

Stick with the back squat if…

✓You want to lift the heaviest weights
✓Wrist or shoulder mobility makes the front rack painful
✓You want the glutes and hamstrings to share the work

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All Variations at a Glance

Each variation changes one thing about the back squat. Read down a column to see what changes, how hard it is, and what that does — every effect is compared with the regular back squat.

↑ more than the back squat ↓ less = about the same

Scroll sideways to see all 6 variations →

	Closest ↑ above Front Squat	Low-Bar Back Squat	Goblet Squat	Box Squat	Pause Squat	Heels-Elevated Squat
What changes	Bar position: upper back → front of the shoulders	Bar position: upper traps → lower, across the rear shoulders	Load: barbell on the back → dumbbell or kettlebell held at the chest	Depth: free → sit back briefly onto a box	Tempo: brief hold → 2–3 s pause at the bottom	Heel height: flat → raised on a wedge or plate
Role	Lateral· Similar difficulty	Lateral· Similar difficulty	Regression· Easier	Regression· Easier	Progression· Harder	Lateral· Similar difficulty
Load you can lift	↓	↑	↓↓	=	↓	=
Main muscle emphasis	↑ quadriceps	↑ glutes & hamstrings	↑ quadriceps	↑ glutes & hamstrings	=	↑ quadriceps
Range of motion	=	↓	= / ↑	↓	=	↑
Balance & stability demand	=	=	=	↓	↑	=
Joint & spine stress	↓ lower back	↑ lower back, shoulders	↓ lower back	↓ knees	=	↑ knees
Difficulty to learn	↑	↑	↓↓	↓	↑	↓
Equipment	Barbell, squat rack	Barbell, squat rack	Dumbbell or kettlebell	Barbell, rack, box	Barbell, squat rack	Barbell or dumbbells, wedge

Arrows are estimates based on how each change alters the movement, not measured values.

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Alternates

Different exercises that train the legs and hips — useful when you lack a rack, want variety or need to spare your back. They are not versions of the back squat itself.

Leg Press

Seated on a machine, pushing a sled away with your feet; the back is supported.

Best for: Heavy leg work without back loading

Leg-press machine

Hack Squat

A machine squat on an angled sled with shoulder pads.

Best for: Quadriceps, learning depth

Hack-squat machine

Bulgarian Split Squat

One foot is raised behind you on a bench while the front leg does the work.

Best for: Single-leg strength and balance

Dumbbells, bench

Walking Lunge

Step forward into a lunge, then bring the back foot through into the next step.

Best for: Legs, glutes and coordination

Dumbbells or bodyweight

Romanian Deadlift

A hip hinge instead of a squat — the knees stay nearly fixed while the hips move back.

Best for: Hamstrings and glutes

Barbell or dumbbells

View guide →

Squat inside a rack with the safety bars set just below your bottom position. Stop if you feel sharp pain in the knees, hips or lower back.