Barbell Squat
The barbell squat has you standing with a loaded bar across your upper back, bending your hips and knees to lower your body until your thighs are at least parallel to the floor, then driving back up to standing. It's the standard compound movement for the quads, with the glutes, hamstrings, and lower back all bracing to support the load, and it's usually the first heavy lift someone learns before moving on to more specialized squat variations.
Why it works
Squatting under a bar loaded across your back forces your quads, glutes, and hamstrings to work together to control a weight that sits directly above your center of mass, which is what makes it one of the most efficient exercises for building whole leg strength in a single movement. Your lower back and core also stay braced the entire time to keep the bar from pulling your torso forward, which is why a strong squat tends to carry over to almost every other lift and daily task that involves bending and lifting.
Set up
- Set the bar in a rack at roughly chest height so you can step under it without straining.
- Position the bar across your upper back, not your neck, gripping it just outside shoulder width.
- Step back from the rack with your feet roughly shoulder width apart, toes turned out slightly.
- Take a full breath and brace your core before you unrack any real weight.
How to do it
- Break at the hips and knees at the same time, keeping the bar over the middle of your foot.
- Lower your hips down and back as if sitting into a chair behind you.
- Keep your chest up and your lower back in its natural curve throughout the descent.
- Lower until your thighs are at least parallel to the floor, or as deep as you can control with good form.
- Drive through your whole foot to stand back up, keeping the bar path straight over your midfoot.
- Finish standing tall with your hips fully extended before starting the next rep.
Form cues
- Knees track in line with your toes, not caving in.
- Chest stays up through the whole rep.
- Weight spread across the whole foot, not just the heels.
- Hips and knees bend together, not one before the other.
Breathing: Take a full breath and brace before you descend, then exhale as you drive back up to standing.
Common mistakes
The knees cave inward as the weight gets heavier.
Fix: Cue yourself to push your knees out in line with your toes on every rep, and drop the load if you can't hold that position.
The chest collapses forward at the bottom of the squat.
Fix: Keep your gaze slightly down and forward rather than straight up, and brace your core harder before you descend.
Rising onto the toes or heels instead of staying flat-footed.
Fix: Practice with lighter weight while consciously pressing all three points of each foot into the floor.
Stopping the descent well above parallel to move more weight.
Fix: Reduce the load until you can consistently reach at least parallel depth with control.
How to program it
- As a heavy compound barbell lift, once a week as your main squat session is a sensible default for most lifters, since full recovery from a hard squat session takes real time.
- Three to five sets of 5 to 8 reps is a common starting range for building strength; higher reps around 10 to 15 work well when the goal shifts toward muscle growth or conditioning.
- If you're squatting twice a week, make one session clearly lighter than the other so your legs aren't grinding through two maximal efforts in the same week.
- Warm up with several lighter sets that build toward your working weight rather than jumping straight to your heaviest set.
Safety notes
- Have a spotter or use safety bars set at an appropriate height when you're working with weight near your limit.
- Stop the set and reduce the load if your lower back rounds noticeably at the bottom of the movement.
Exercise profile
- Force
- Push
- Mechanics
- Compound
- Category
- Strength
Frequently asked questions
How deep should you squat?
At least until your thighs are parallel to the floor, since that's where the quads and glutes get the most out of the movement. Going deeper is fine and often more comfortable for your knees if your ankles and hips allow it with control; stopping well above parallel just to move more weight cuts the exercise short.
How many sets and reps of barbell squats should beginners do?
Three sets of 5 reps with a weight you can control well is a solid starting point. Add weight in small increments session to session rather than chasing a heavier number every time you train.
Barbell squat vs front squat, what's the difference?
The back squat lets you handle more total weight since the bar sits over your hips, while the front squat shifts the bar to the front of your shoulders, which demands a more upright torso and asks more of the upper back and core to hold that position.
What can I do without a barbell?
A goblet squat or dumbbell squat trains the same quad-dominant pattern with far less setup, and works well both as a warm-up for the barbell version and as a full substitute on days you don't have a rack.
Why do my knees hurt during squats?
Knee discomfort during squats often comes from the knees caving inward or from stopping the descent at an awkward partial depth repeatedly. Slow the rep down, keep your knees tracking over your toes, and reduce the weight until the position feels controlled again.