Back squat form: a no-nonsense technique guide

Good back squats form is not a mystery, a mobility routine or a secret cue from a guy on the internet with a lot of chalk. It's a bar on your upper back, a big breath, a controlled sit between your heels and a stand back up. The hard part is doing it the same way every rep while the weight goes up.

This guide covers back squat form from the rack to the bottom and back: bar position, stance, bracing, depth, knee travel, the faults that quietly cap your progress, and how to fit heavy squats around running. Program it yourself or use a Fitbod alternative that plans your runs too. Either way, the technique is on you.

What the back squat is (and why runners should still bother)

The back squat is a barbell squat with the bar resting across your upper back. It's the lower-body lift you can load the heaviest, which is the whole point. Quads, glutes and adductors do most of the work, the hamstrings and back hold you together, and the trunk keeps the bar from folding you in half.

For runners, heavy matters. A 2024 meta-analysis on middle- and long-distance runners found high-load strength training (at least 80% of one-rep max) improved running economy, while submaximal loads did not show the same benefit. The back squat is the easiest place to get that kind of load, which is why it shows up in almost every version of a runner's strength program.

It's not the only squat that matters, though. Single-leg work trains each leg on its own with a fraction of the weight, and the hub for that whole family is more on bulgarian split squat. Most good programs use both.

High bar vs low bar

There are two common bar positions, and neither is wrong.

• ›High bar: the bar sits on top of the upper traps, just below the bony bit at the base of your neck. More upright torso, more knee bend, deeper squat.
• ›Low bar: the bar sits a few centimeters lower, across the rear shoulders. More forward lean, more hip bend, usually more weight on the bar.

A review of high-bar and low-bar squat biomechanics found the high bar is characterized by greater knee flexion, a more upright torso and a deeper squat, while the low bar involves more hip flexion and forward lean, with greater activity in the erector spinae, adductors and glutes. The high bar showed greater quadriceps activity.

For most people who run and lift, high bar is the sensible default. It's easier on the shoulders, it looks more like the positions you use in life and sport, and you don't need to set a powerlifting total. If you already low-bar squat comfortably, keep doing it.

Back squat form, step by step

1. Set the rack and the safeties

Bar at about mid-chest height, so you have to bend your knees slightly to get under it. If you have to tiptoe to unrack, it's too high. Set the safety pins just below the bottom of your squat. If you miss a rep, you sit down and leave the bar on the pins. That's the plan, not a failure.

2. Grip and get under it

Hands just outside shoulder width, or wider if your shoulders are stiff. Duck under, put the bar in your chosen spot, and squeeze your shoulder blades together to make a shelf of muscle for it to sit on. Wrists roughly straight, elbows pointing down and slightly back. Your hands hold the bar in place. Your back carries it.

3. Unrack and walk out

Stand up with the bar, take two or three small steps back, and stop. No long walkouts. Every extra step is energy you won't have at the bottom.

4. Set your stance

Feet about shoulder width, toes turned out a little. Exactly how wide and how turned out depends on your hips, so experiment with an empty bar and pick the stance where you can sit deepest with your heels down and your back flat. It should feel like the same stance as your goblet squat.

5. Brace

Big breath into your belly, not your chest. Ribs down. Tighten your trunk as if someone is about to poke you in the stomach. Hold that breath through the way down and most of the way up. This is the step most people skip, and it's the one that keeps the bar where it belongs.

6. Sit down between your heels

Break at the hips and knees together. Knees travel forward and out in line with your toes. Keep your weight over midfoot, the whole foot planted.

About the knees going past the toes: let them. In a small study of seven weight-trained men, physically blocking the knees from moving past the toes changed hip and knee torques, and the authors concluded that while restricting the knees may reduce stress on them, forces are likely transferred to the hips and lower back instead. Their practical take was that the knees may need to move slightly past the toes. How far depends on your build and your ankles.

7. Drive up

Push the floor away through the whole foot. Chest and hips rise together. Exhale near the top, take a new breath, re-brace, go again.

How deep should you back squat?

As deep as you can with a flat back, heels down and control. For most people that's thighs at or below parallel.

Depth isn't just a gym-ego argument. In a 10-week trial in 17 men, the group training full squats increased their full-squat one-rep max by 31.8% versus 11.3% for the half-squat group, and the authors concluded full squat training was more effective for developing the lower-limb muscles, excluding the rectus femoris and hamstrings. Small study, but it backs the coaching default: train the full range you can control.

If depth is limited, a box set at your current depth is a useful guide, and small plates under the heels can help while ankle mobility catches up.

Common back squat form mistakes

One more: chasing numbers on bad reps. If the last rep looks nothing like the first, the set was over a rep earlier.

How to program back squats

Coaching conventions, not commandments. RPE 8 means about two reps left in reserve.

Progress in small jumps. When every rep of every set looks the same and the effort sits below your target, add the smallest plates you have. Warm up with a few sets of goblet squats or an empty bar before the heavy work.

Where back squats fit a running week

Heavy squats leave your legs heavy. Plan for it instead of discovering it during intervals.

• ›Never heavy squats the day before intervals or the long run.
• ›Two setups work. Stack it: run your quality session in the morning and squat later the same day, so the easy days stay easy. Or split it: squat on an easy-run day with no hard running the day after.
• ›If both are on the same day, the priority goes first. In a race block, that's usually the run.
• ›Keep the load, cut the volume in a race build. Two or three heavy sets once a week holds strength without leaving you sore.

Back squat vs front squat and single-leg work

The back squat is the heavy option, not the only option. Moving the bar to the front of your shoulders gives you a more upright, quad-heavy squat; that's the short answer to what muscles do front squats work. A biomechanical comparison of back and front squats in 15 trained individuals found the front squat was as effective as the back squat for overall muscle recruitment, with significantly lower compressive forces and knee extensor moments. A study at maximal loads found significantly more trunk lean in the back squat than the front squat.

Single-leg lifts cover what bilateral squats don't. If you're new to them, start with our guide to split squat form, then add the Bulgarian when that gets easy. In a 5-week trial in academy rugby players, training only with rear-foot elevated split squats or only with back squats produced similar improvements in back squat strength, 40 m sprint time and change of direction. Small study, short timeframe, but a reasonable sign that single-leg work isn't a downgrade.

If back squats bother your back or knees rather than just feeling hard, see a professional, and in the meantime pick an alternative to squats that you can load without pain. The split squat vs bulgarian split squat choice is mostly about range and how much balance you want to deal with. Step-ups belong in the same family too, and the comparison of step ups vs bulgarian split squats comes down to how much range you want to load and how sore you're willing to be.

How exrsz handles back squats

exrsz builds a periodized plan from your goal, schedule, level and equipment. If you have a rack, you get back squats; if you don't, you get a squat you can actually do. It places heavy leg days around your runs in one plan, adapts the load each week to what you actually lifted, and reshuffles sessions you miss.

FAQ

What is correct back squat form?

Bar on the upper back, feet about shoulder width with toes slightly out, a big brace, then sit down between your heels with knees tracking over your toes until your thighs reach at least parallel. Drive up with chest and hips rising together.

Should my knees go past my toes when I back squat?

They usually will, and that's fine as long as your heels stay down. A study of restricted knee travel found blocking the knees likely shifts forces to the hips and lower back.

Is high bar or low bar better?

Neither overall. A review of both positions found high bar is more upright and quad-focused, while low bar involves more forward lean and more hip muscle activity. Most runners do fine with high bar.

How deep should I squat?

As deep as you can with heels down and a flat back, usually at or below parallel. A 10-week trial found full squats improved full-squat strength more than half squats.

How often should runners back squat?

Once or twice a week, heavy, with a few reps left in reserve. Keep it away from the day before intervals or the long run, and drop to one shorter session in a race build.