Barbell Back Squat

Set up in a squat rack with the bar across your upper traps. Unrack the bar and step back, feet shoulder-width apart with toes slightly turned out. Brace your core and descend by breaking at the hips and knees simultaneously until your hip crease is below your knees. Drive through your full foot to stand back up, keeping your chest up and knees tracking over your toes throughout.

Pro Tips

• Keep your chest up and upper back tight throughout the lift
• Drive through your full foot — not just your heels
• Take a deep breath and brace your core before each rep
• Control the descent for 2-3 seconds; explode on the way up

Muscles worked

Primary: Quadriceps (vastus lateralis, vastus medialis, vastus intermedius, rectus femoris — knee extension throughout the ascent) and gluteus maximus (hip extension, most active in the bottom third of the squat).

Supporting: Hamstrings (isometric stabilisation at the knee), adductors (inner thigh, active in the bottom position), erector spinae (lumbar extension to maintain torso angle), core (bracing against axial load), upper back (supporting bar position and preventing forward lean).

Common mistakes

Knee cave (valgus collapse): Knees collapsing inward on the ascent is the most common squat error. It is typically a hip abductor and glute weakness issue, not a technique error. Cue: push the knees out in the direction of the toes throughout the lift.

Excessive forward lean: Some forward lean is normal and necessary. Excessive lean — where the torso approaches parallel to the floor — shifts load from the quads to the lower back and signals either ankle mobility limitations or bar position problems. Check squat shoes or heel elevation if this persists.

Half-reps: Stopping above parallel reduces quad and glute loading at the most demanding portion of the lift. Hip crease must pass below the knee for a full squat.

Loss of bracing mid-rep: Breathing out fully mid-descent collapses the intra-abdominal pressure that protects the spine under load. Take a full breath before each rep and maintain the brace through the entire rep.

Programming notes

The barbell back squat is the foundational lower body strength exercise in most serious strength programmes, appearing as the primary lift in 5x5, Starting Strength, 5/3/1, and nearly every periodised strength template. Its combination of total muscle mass recruitment, axial loading, and bilateral strength expression makes it the standard test for lower body strength.

In linear programmes, the squat is performed every session (or alternating sessions) with 5x5 or 3x5 sets. In intermediate periodised programmes, it typically occupies the A-day primary slot for 3–5 sets of 3–8 repetitions at prescribed percentages of training max.

Frequently asked questions

How deep should you squat — and does depth really matter for muscle growth?

Depth matters both for safety and for results. A full squat — hip crease below the knee — maximises quad and glute activation because both muscles are stretched furthest at the bottom and produce the most force during the ascent out of that position. Research consistently shows greater quad hypertrophy from full-depth squats compared with partial reps. If you cannot yet reach depth without your lower back rounding, work on ankle and hip mobility rather than cutting the range.

What is the difference between high-bar and low-bar squat, and which should you use?

High-bar places the bar across the upper traps, producing a more upright torso and greater quad dominance — the standard setup for most lifters and all Olympic weightlifters. Low-bar sits the bar across the rear deltoids, forcing a more forward lean that shifts more load onto the posterior chain and allows most people to move heavier absolute weights. Use high-bar if you are training for hypertrophy, athletic carry-over, or Olympic lifting. Use low-bar if your primary goal is a maximal squat total in powerlifting.

How often should you squat each week to get stronger?

For most intermediate lifters, squatting two to three times per week produces faster strength gains than squatting once. Frequency allows you to practise the pattern more often and distribute weekly volume across sessions at higher per-set quality. Beginners on linear progression typically squat three times per week with near-daily progression. Advanced lifters may squat four or more times per week using daily undulating periodisation, but the absolute minimum for continued progress is twice per week with adequate load and progressive overload applied over time.