Barbell Side Split Squat
The barbell side split squat has you standing with a barbell across your back, stepping one foot out to the side while the other stays planted, then bending the standing leg to lower your hips toward the floor. It's a single-leg-dominant squat pattern that trains the quads through a wide range while the hips and adductors work to keep you stable moving sideways instead of straight down.
Why it works
Bending sideways at one hip while the other leg stays extended asks your quads and glutes to control your bodyweight through a different plane than a standard squat, which is where most of your training time probably goes. Your adductors also get pulled into the work, since they have to resist the outward pull of the moving leg and help pull you back to center. Because you can only load one side at a time this way, it also exposes side to side strength differences that a bilateral squat can hide, which makes it a useful diagnostic movement even for lifters whose main goal is a stronger regular squat.
Set up
- Rest the barbell across your upper back, gripping it slightly wider than shoulder width.
- Stand with your feet together, then plan a wide step directly out to one side.
- Brace your core and keep your chest up before you start moving.
- Point your toes slightly outward on the side you're about to bend toward.
How to do it
- Step one foot out wide to the side while keeping the other leg straight.
- Bend the stepping leg's knee and hip, lowering your body toward that side.
- Keep the straight leg's foot flat and its knee only slightly bent, not locked.
- Lower until your bent thigh is roughly parallel to the floor or as deep as your hips allow with control.
- Push through the bent leg's foot to drive back up to standing.
- Complete all reps on one side before switching, or alternate sides as your program specifies.
Form cues
- Knee tracks over the toes on the bending side.
- Chest stays up, don't fold forward.
- Push through the whole foot, not just the heel.
- Straight leg stays long, not locked hard.
Breathing: Inhale as you lower into the bend, exhale as you drive back up to standing.
Common mistakes
The bending knee caves inward toward the other leg.
Fix: Actively push the knee out in line with your toes throughout the descent.
Leaning the torso forward over the bending leg.
Fix: Keep your chest lifted and your hips sitting back, similar to a regular squat, rather than folding at the waist.
Using too narrow a step, which turns the move into a regular squat.
Fix: Take a genuinely wide step so most of the work happens on one leg at a real side angle.
Rushing the transition between sides without resetting your stance.
Fix: Return fully to the starting position and reset your footing before stepping to the next side.
The heel of the bending leg lifts off the floor at the bottom of the movement.
Fix: Keep weight spread through the whole foot on the bending side, and shorten the step slightly if the heel keeps rising.
How to program it
- This is a loaded, single-leg-dominant squat pattern, so treat it like your main lower body lift for the day rather than an add-on; once a week is a sensible default.
- Two to three sets of 6 to 8 reps per side is a solid starting range while you learn the balance this movement asks for.
- If this is only supplementing a squat or deadlift you're already doing that week, a lighter second session can work, but drop the load noticeably when you do.
- Start with just the empty bar until the sideways step feels stable before adding real weight.
Safety notes
- Keep the load light while you're still learning the balance point of the sideways step; a wobble under a heavy bar is a real fall risk.
- If your knee tracks inward and you can't correct it consistently, drop the weight and rebuild the pattern before going heavier.
Exercise profile
- Force
- Push
- Mechanics
- Compound
- Category
- Strength
Frequently asked questions
How many sets and reps of barbell side split squats should I do?
Two to three sets of 6 to 8 reps per side works well for most people. Since you're loading one leg at a time through an unfamiliar angle, prioritize control over adding weight quickly.
What can I do instead if I don't have a barbell?
A dumbbell in each hand trains the same sideways squat pattern and is easier to set down quickly if you lose your balance while you're still learning it.
Why does my knee hurt during the side split squat?
Knee discomfort here usually traces back to the knee caving inward as you bend. Slow the rep down and consciously push the knee out over your toes; if pain continues, drop the load and check your depth with a mirror or video.
What's an easier version to build up to this?
A bodyweight lateral bound or step trains the same side to side movement pattern without any load, a good way to learn the balance before adding a bar.