Short answer: Good barbell squat form starts with the bar across the upper back and feet about shoulder width. Bend at the hips and knees together, keep your back straight and knees pointed the same way as your feet, and descend until the hip crease is below the top of the kneecap. Then stand until hips and knees are straight.
That one paragraph covers the basics of barbell squat form. The rest of this guide breaks it into setup, descent, depth, and drive, then covers the muscles involved, the rules if you compete, and the faults worth fixing first. It is written for powerlifters, Olympic lifters, CrossFitters, and anyone building leg strength.
How do you set up for a barbell squat?
ExRx's barbell squat instructions start in a rack:
- Set the bar at upper-chest height on the rack.
- Get under it and place the bar high on the back of your shoulders. Grip the bar out to your sides.
- Unrack by standing up with it, then step back.
- Set your stance at about shoulder width.
- Distribute your weight evenly through the forefoot and heel, feet flat on the floor.
IPF powerlifting rules add that in competition the bar must sit horizontally across the shoulders at a height no lower than the posterior deltoid level, with the hands, thumbs, and fingers in complete contact with the bar.
How do you descend and stand up?
- Bend the hips back while letting the knees bend forward. Both joints move together.
- Keep your back straight and your head facing forward.
- Keep your knees pointed the same direction as your feet for the whole rep.
- Reverse at the bottom by extending knees and hips until your legs are straight.
How deep should a squat be?
ExRx describes descending until the thighs are just past parallel to the floor, with the crease at the hips lower than the top of the kneecap. Under section 4.1.1 of the IPF rulebook, a squat is disqualified for failure to bend the knees and lower the body until the top surface of the legs at the hip joint is lower than the top of the knees.
If you can't reach that depth with a straight back yet, squat to the depth you can control and work toward it. Depth with good position beats depth with a rounded back.
What muscles does the barbell squat work?
ExRx breaks it down this way:
| Role | Muscles |
|---|---|
| Target | Quadriceps |
| Synergists | Gluteus maximus, adductor magnus, soleus |
| Dynamic stabilizers | Hamstrings, gastrocnemius |
| Stabilizers | Erector spinae |
| Antagonist stabilizers | Rectus abdominis, obliques |
That spread is why the squat shows up in nearly every strength program: one lift trains the front and back of the legs, the hips, and the trunk muscles that hold your torso in position.
What are the powerlifting rules for the squat?
From the IPF Technical Rulebook, a squat is disqualified for, among other things:
- Not following the chief referee's start and rack signals.
- A double bounce at the bottom or any downward movement on the way up.
- Not standing upright with knees locked at the start and finish.
- Stepping forward, backward, or sideways. Rocking between ball and heel is allowed.
- Not lowering until the top surface of the legs at the hip joint is lower than the top of the knees.
- Contact of the elbows or upper arms with the legs. Slight contact is permitted if it gives no support.
Other federations have their own rulebooks, so check yours before a meet.
What are the most common squat faults?
- Knees caving in. Keep them tracking the same line as your feet.
- Heels lifting. Keep weight spread across the forefoot and heel.
- Cutting depth. Check the hip crease against the top of the knee, on video if needed.
- Rounding the back. Lighten the load and own the position first.
- Bouncing out of the hole. Fine in training if controlled, but a meet will red-light a double bounce.
How should you program squats?
Programs vary, but the pattern is consistent: squat on one or more days a week, progress load in small steps, and keep form constant as the weight rises. If you also bench, the same build-the-setup-first approach is in our bench press technique guide.
Keep your hands set too. A squat grip is not a max-strength grip, but a solid hold keeps the bar from sliding on your back. The same principles in How to Set Your Grip Before the First Rep apply: squeeze, and keep your wrists stacked.
FAQ
How deep should you squat?
ExRx describes descending until the thighs are just past parallel, with the hip crease lower than the top of the kneecap. In IPF powerlifting, a squat is disqualified for failure to bend the knees and lower the body until the top surface of the legs at the hip joint is lower than the top of the knees.
What muscles does the barbell squat work?
ExRx lists the quadriceps as the target, with the glutes, adductor magnus, and soleus as synergists, and the hamstrings, calves, spinal erectors, and abs helping stabilize.
Which way should my knees point?
The same direction as your feet throughout the lift.
Can you bounce out of the bottom in a powerlifting meet?
No. IPF rules disqualify a double bounce at the bottom or any downward movement during the ascent.
Next rep
Film one set from the side this week and check two things: hip crease below the knee, and knees tracking your toes.