A proper squat starts with your feet roughly shoulder-width apart, toes turned out about 20 degrees, and your weight distributed across your whole foot. From there, you bend at the hips and knees simultaneously, lowering yourself until your thighs reach at least parallel with the floor, then drive back up. That’s the basic movement, but the details of setup, breathing, and depth make the difference between a squat that builds strength and one that feels awkward or causes pain.
Stance and Foot Position
Place your feet about shoulder-width apart. This moderate width works well for most body types and allows a balanced load across the hips, knees, and ankles. Some people prefer a slightly wider stance, but going much narrower tends to limit depth and shift more stress to the knees.
Turn your toes outward about 20 degrees on each side. You’ll sometimes hear the old cue to keep your toes pointed perfectly straight, but research on squat biomechanics shows that a moderate outward angle lets the hips open more naturally and reduces unnecessary torque on the knee joint. A simple way to find this angle: point your feet straight ahead, then rotate each foot outward slightly until you feel your hips “unlock.” That’s roughly where you want to be.
How to Descend
Before you drop, take a breath and brace your core (more on this below). Then initiate the movement by pushing your hips back and bending your knees at the same time. Think of sitting back into a chair rather than folding straight down. Your torso will naturally lean forward to about 45 degrees as you descend, and that’s fine. Trying to stay perfectly upright often forces the knees forward excessively or prevents you from reaching depth.
As you lower, track your knees in the same direction your toes are pointing. If your toes are turned out 20 degrees, your knees should push outward along that same line. Letting the knees cave inward is the most common fault beginners make, and it places uneven stress on the ligaments inside the knee.
Keep your weight balanced between the ball of your foot and your heel. If your heels lift off the ground, you likely need more ankle mobility (covered below) or a slightly wider stance.
How Deep Should You Go?
Squat depth is generally categorized three ways: partial (above parallel), parallel (thighs roughly level with the floor, around 90 degrees of knee bend), and deep (well below parallel, 110 to 135 degrees of knee bend). For general fitness, parallel is a solid standard that most people should aim for.
Deeper squats do increase glute activation, though the difference is moderate. One study found the glutes worked at about 35% of their maximum capacity during deep squats compared to 28% at parallel depth. Quadriceps activity may increase by roughly 29% as you go deeper, though findings vary. Hamstring activation stays relatively low in all squat depths, typically between 4% and 12% of maximum. The real workhorses of the squat are your quads and glutes.
If your lower back rounds or your heels lift before you reach parallel, stop at whatever depth you can maintain good form and work on mobility. Forcing depth you don’t have the flexibility for is how people get hurt.
Breathing and Bracing
Proper breathing during a squat does two things: it stabilizes your spine and gives you more power out of the bottom. Before you descend, take a deep breath into your belly (not your chest), then tighten your abdominal muscles as if someone were about to poke you in the stomach. This increases pressure inside your torso, which stiffens the ribcage and supports the lumbar spine like an internal weight belt.
Hold that brace throughout the descent. As you drive back up through the hardest part of the lift, exhale slowly through pursed lips or with a controlled grunt. The key is not to release all the air at once, which would collapse your trunk stability mid-rep. At heavy loads (above roughly 80% of your maximum), this bracing pattern happens almost automatically because your body needs the spinal support.
Knees Past the Toes: Why It’s Fine
One of the most persistent squat myths is that your knees should never travel past your toes. This idea comes from studies in the 1970s and 1980s that found greater shearing forces on the knee when it moved forward. But more recent biomechanical research has overturned this advice for healthy people.
When researchers had people deliberately keep their knees behind their toes during squats, the stress on the hip joints increased by nearly 1,000%. The load doesn’t disappear. It just shifts from the knees to the hips and lower back, which is a worse trade-off for most people. Your body’s proportions, especially the length of your thigh bone relative to your torso, dictate how far your knees naturally travel. Trying to fight that creates more problems than it solves.
For healthy, trained individuals, allowing the knees to move naturally past the toes is considered a normal and necessary part of the squatting movement. The only population that may benefit from limiting forward knee travel is people actively rehabbing a knee injury, where reducing compressive forces on the kneecap matters.
Common Mistakes and How to Fix Them
Lower Back Rounding
When your pelvis tucks under at the bottom of a squat (sometimes called “butt wink”), your lower back rounds and loses its neutral arch. This puts the spinal discs in a vulnerable position, especially under load. The three most common causes are limited ankle mobility, tight hips, and the actual shape of your hip socket, which varies person to person. If your ankles are stiff, your body compensates by rounding the lower back to get deeper. Stretching your calves and working on ankle mobility often fixes this more than any hip drill.
Heels Lifting
A full-depth squat requires about 38 degrees of ankle dorsiflexion, which is the ability to bring your shin forward over your foot. Most people who spend their days sitting or wearing shoes with raised heels fall short of this. Placing small weight plates under your heels is a temporary fix. Weightlifting shoes with a raised heel serve the same purpose. Long term, improving ankle flexibility through calf stretches and ankle mobility drills is a better solution.
Knees Caving Inward
This usually signals weak glutes rather than a technique problem. Wrapping a light resistance band just above your knees during warm-up sets gives your brain a target to push against and teaches the correct knee tracking pattern over time.
The Goblet Squat for Beginners
If you’re new to squatting, the goblet squat is the best place to start. Hold a dumbbell or kettlebell vertically against your chest with both hands, then squat normally. The weight in front of your body acts as a counterbalance, making it easier to sit back without falling, and it naturally pulls your torso into a more upright position. This reduces stress on the lower back and often helps people reach a deeper squat than they can manage with a barbell.
Front-loaded squats like the goblet squat also promote greater hip and knee flexion compared to back squats, which makes them a useful tool for improving mobility while building strength. Once you can comfortably goblet squat a moderate weight for sets of 10 to 15 reps with solid form, you’re ready to transition to barbell squatting if you choose.
Warming Up Before You Squat
Cold muscles and stiff joints make every part of the squat harder. A five-minute dynamic warm-up before squatting improves your range of motion immediately and helps you hit depth more easily. Focus on movements that open the hips, ankles, and upper back:
- Walking knee hugs: Pull one knee to your chest while standing tall, alternate sides for 10 to 15 yards. This loosens the glutes and hip flexors.
- Walking lunges with rotation: Step into a lunge, then rotate your torso over the front leg. This opens up the hips, groin, and thoracic spine simultaneously.
- Bodyweight deep squats: Drop into the bottom of a squat and hold for 15 to 30 seconds, gently pressing your knees outward with your elbows. This is the single best drill for preparing your body to squat with load.
- Walking figure-4 stretch: Cross one ankle over the opposite knee while standing, then sit your hips back into a single-leg squat position. This targets the deep hip rotators that control knee tracking.
After the dynamic warm-up, start your squat session with one or two light sets before working up to your target weight. This gives your nervous system time to rehearse the movement pattern and lets you identify any tightness before the load gets heavy.