How to Do Squats Correctly with Proper Form and Depth

How to Do Squats Correctly: Form, Depth, and Adjustments for Your Body

Estimated Reading Time: 6 minutes

Introduction

To perform a basic bodyweight squat correctly, stand with your feet roughly shoulder-width apart, brace your midsection as if preparing for a gentle tap, and sit down by bending your hips, knees, and ankles simultaneously. Keep your heels firmly grounded, let your knees travel naturally in the direction of your toes, descend as far as you can while maintaining balance and a neutral spine, and push through the floor to return to standing.

There is no single universal squat template. The human skeleton varies dramatically from person to person: hip socket depth, femoral neck angles, and limb proportions dictate how wide you stand and how deep you comfortably travel. Learning how to do squats correctly is not about forcing your body into an arbitrary shape, but coordinating three lower-body joints under control while maintaining spinal stability.

Step-by-Step Squat Technique

A squat involves simultaneous hip, knee, and ankle flexion during the descent, followed by extension of all three joints as you stand back up, according to biomechanical reviews in the Journal of Strength and Conditioning Research. Managing these moving parts requires deliberate setup and execution.

1. The Stance and Foot Placement

Begin by standing with your feet approximately shoulder-width apart. Turn your toes slightly outward—usually between 5 and 20 degrees—depending on what feels most natural for your hips.

Your entire foot must remain anchored to the floor. Distribute your weight evenly between the ball of your foot and your heel. If you feel like you are rocking onto your toes or falling backward onto your heels before you even bend your knees, adjust your stance slightly wider or adjust the flare of your toes until your base feels stable.

2. The Trunk Brace

Before initiating the movement, establish a stable spine. You do not need to suck in your stomach or violently arch your lower back. Instead, create light 360-degree tension around your torso, as if bracing for a light nudge. Maintain a neutral spine where your ribs sit comfortably over your pelvis. Keep your gaze directed forward or slightly upward to prevent your upper back from slumping forward.

3. The Descent

Begin the downward movement by bending your hips and knees at the same time. Think of sitting down between your thighs rather than pushing your hips straight back like a hinge.

As you lower yourself:

• Allow your knees to move forward freely in line with your toes.
• Keep your heels pinned to the floor.
• Maintain your chest angle without letting your shoulders drop toward the ground.
• Continue downward in a smooth, controlled motion without dropping quickly or bouncing.

4. Choosing Your Depth

Descend to a point where you can comfortably control your balance and keep your trunk stable. While reaching a point where your thighs are parallel to the floor is a frequent training benchmark, it is not a requirement for an effective or safe squat. Stop before your lower back rounds excessively or your heels leave the floor.

5. The Ascent

To return to the top, push the floor away smoothly through your midfoot and heels. Keep your knees tracking along the same line they followed on the descent, avoiding any inward collapse. Stand tall until your hips and knees are fully extended, resetting your breath and brace before the next repetition.

Knees Over Toes: Safety Rule or Biomechanical Myth?

For decades, recreational exercisers were told that letting the knees travel past the toes is dangerous and bad for joint health. Biomechanical research does not support this as a universal rule.

According to a comprehensive review in the Strength and Conditioning Journal, placing an artificial restriction on forward knee movement alters how forces are distributed across your body. When lifters intentionally keep their shins completely vertical to prevent the knees from passing the toes, knee torque decreases slightly, but hip torque increases dramatically. The demand does not vanish; it simply shifts to your hips and lumbar spine, forcing a far steeper forward torso lean.

Allowing your knees to travel naturally past your toes over your foot distributes mechanical loading across the ankles, knees, and hips together. Unless an exercise professional or clinician working with your specific injury history has advised you to limit knee flexion or anterior shear, you do not need to prevent your knees from moving forward naturally.

Squat Depth: How Low Should You Go?

Squat depth is commonly categorized into three ranges based on knee angle and thigh position:

• Partial squats: Descending until knee flexion reaches roughly 40 degrees.
• Half squats: Descending to roughly 70 to 90 degrees of knee flexion.
• Deep squats: Descending until thighs pass parallel to the ground (often 100 degrees or more of knee flexion).

Research on squatting kinematics and kinetics shows that joint moments, muscle recruitment, and compressive forces change across these different depths. However, no single depth is objectively superior or safest for every person.

Squatting deep requires substantial dorsiflexion mobility in the ankles, adequate internal and external hip rotation, and spinal motor control. If you force a deep squat without the required mobility, your body will compensate: your heels will elevate, your pelvis will tuck under, or your torso will collapse forward.

The optimal depth for your squat is simply the lowest point you can reach while keeping:

1. Both heels flat on the floor.
2. A neutral, stable spine.
3. Total control over your balance without pain.

If that point is several inches above parallel, train there. Over time, consistent movement practice may allow you to descend deeper comfortably, but chasing depth at the expense of spinal or foot stability is counterproductive.

Common Form Mistakes and Fixes

1. Knees Collapsing Inward (Valgus)

During both the descent and ascent, your knees should track in roughly the same direction that your toes point. Allowing the knees to cave toward the midline is one of the most frequent faults noted in visual assessments of squat technique.

How to address it: Consciously guide your knees outward so they stay aligned over your midfoot as you descend and stand. You do not need to force an exaggerated, bow-legged position—simply ensure your knees do not track inside the line of your big toes.

2. Heels Lifting Off the Ground

If your heels rise as you descend, your center of mass shifts forward onto your toes, reducing your base of support and overloading the front of the knee.

How to address it: This often stems from limited ankle dorsiflexion or attempting to stay overly upright. Try widening your stance slightly and rotating your toes out a few degrees more. If your heels still lift, shorten your range of motion. Only descend as far as you can while maintaining full contact between your entire foot and the floor.

3. Copying Another Person’s Stance

Watching an elite athlete squat with their feet close together and toes straight forward can tempt you to do the same. However, hip socket geometry varies widely across the population. Some people have deep hip sockets that physically pinch if they squat with a narrow stance; others have shallow sockets that permit deep squats with narrow feet.

How to address it: Experiment with your setup. Test a narrow stance, a shoulder-width stance, and a slightly wider stance. Pay attention to how your hips feel. The correct stance is the one that allows you to reach your target depth smoothly without hip pinching or spinal rounding.

Regressions and Progressions

If balancing a free-standing bodyweight squat feels uncomfortable or unsteady, use regressed variations to develop motor control. Likewise, once your bodyweight mechanics are solid, you can progress to more challenging variations. The American Council on Exercise (ACE) emphasizes mastering fundamental technique before progressing to loaded or explosive variations.

Easier Variations (Regressions)

The Chair Squat

For beginners, people recovering functional strength, or anyone uncertain about their balance, the chair squat provides an external safety net. As noted in clinical guidance from South Tees Hospitals NHS Foundation Trust, using a chair helps build functional hip and leg strength safely while preventing you from sinking into a range of motion that is difficult to reverse.

• How to do it: Stand directly in front of a sturdy chair, facing away from it. Set your feet shoulder-width apart. Lower yourself slowly toward the seat under complete control. Lightly touch the chair with your hips (or sit down fully without slumping), then push through your heels and stand back up.

The Supported Squat

If your lower body is strong enough to squat, but balance or ankle mobility causes you to fall backward, use a solid anchor point.

• How to do it: Hold onto a secure doorframe, suspension trainer, or sturdy rail with both hands at chest height. Perform your squat while using your hands lightly for stability. Use only as much upper-body assistance as needed to maintain balance and stay upright.

Advancing Your Squat (Progressions)

Once you can perform multiple clean, controlled bodyweight squats with stable foot contact and spinal control, you can explore variations that challenge your balance, strength, and coordination differently:

• Goblet Squat: Holding a light dumbbell or kettlebell against your chest acts as a counterbalance, which often helps exercisers sit deeper while keeping their torso upright.
• Barbell Back Squat: Placing a barbell across your upper back allows you to apply greater resistance, but requires substantial shoulder mobility, trunk stiffness, and technique consistency.
• Split Squats and Single-Leg Variations: Shifting work to one leg at a time challenges unilateral stability, balance, and hip stabilizers without requiring heavy loads.

How Many Repetitions and Sets Should You Do?

Current scientific literature does not provide a single, universal prescription for beginner squat volume, sets, or rest intervals. An ideal training dose depends on your baseline strength, recovery ability, health status, and goals.

Instead of following arbitrary numbers, use movement quality as your guideline:

• Start with a conservative volume—such as 2 to 3 sets of 5 to 8 controlled repetitions.
• Rest long enough between sets to catch your breath and feel steady (typically 1 to 2 minutes for unweighted practice).
• End each set while you still have good form. If your knees begin to cave inward, your back rounds, or you feel unsteady, stop the set.
• As the movement feels natural and effortless, gradually add repetitions or an additional set over several weeks.

Safety and When to Consult a Professional

Squats are a fundamental human movement, but they must be adapted to your body. Experiencing mild muscle fatigue or effort is normal; sharp joint pain is not.

Stop squatting and reassess if you experience:

• Sharp, catching, or radiating pain in your knees, hips, or lower back.
• Sudden dizziness, faintness, or loss of balance.
• Joint swelling or aching that persists for days after practice.

Educational Note: Biomechanical studies provide generalized data regarding joint moments and muscle loading; they do not predict how a specific injury or anatomical anomaly will respond to exercise. If you are managing chronic knee osteoarthritis, hip impingement, previous spinal surgeries, or persistent pain, consult a physical therapist or qualified exercise professional. They can evaluate your movement in person and design modifications that fit your health status.

Next Steps

To build consistency, practice your bodyweight setup in front of a mirror or record a short video from both the front and side. Check your foot stability, knee tracking, and torso angle against the principles above. Once your unweighted movement pattern feels balanced and repeatable across several sessions, consider introducing a modest progression—such as pausing for one second at the bottom of each repetition or holding a light weight in a goblet position.

Frequently Asked Questions