Exercise Overview

Mini squats are your first step toward full squatting after ACL surgery. By limiting the depth to 30-45 degrees of knee flexion, you can safely strengthen your quadriceps while protecting your healing graft. This exercise is fundamental for regaining the strength needed for stairs, walking, and eventually returning to sport.

Why Mini Squats Are Important

  • Functional movement: Mimics sitting, stairs, and daily activities
  • Quad strengthening: Essential for knee stability
  • Weight-bearing: Promotes bone and graft healing
  • Bilateral loading: Your good leg helps support you
  • Foundation: Prepares you for deeper squats and lunges

Depth Matters

In early recovery, limit your squat depth to 30-45 degrees of knee flexion. Deeper squats put more stress on the graft and patellofemoral joint. Progress depth gradually as cleared by your PT/surgeon.

How To Perform

1

Starting Position

Stand with feet shoulder-width apart (or slightly wider). Toes should point forward or slightly outward (10-20 degrees). Distribute weight evenly between both legs.

2

Use Support Initially

Hold onto a counter, chair back, or wall for balance. As you gain confidence and strength, reduce how much you rely on support.

3

Initiate the Squat

Push your hips back slightly (like sitting into a chair), then bend your knees. Keep your chest up and core engaged.

4

Control Your Depth

Lower only to 30-45 degrees of knee bend (about a quarter of a full squat). Your thighs won't be parallel to the ground—that's intentional.

5

Check Knee Position

Watch that your knees track over your toes—not caving inward. Both knees should stay aligned throughout.

6

Return to Standing

Push through your heels (not toes) to stand back up. Squeeze your glutes at the top.

Common Mistakes

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Going Too Deep

Squatting past your current safe range puts excess stress on your graft and kneecap. Start shallow and progress depth over weeks/months.

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Knee Valgus (Caving In)

Letting your knees collapse inward is a major no-no. Push your knees out over your toes. If you can't control this, do more hip strengthening first.

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Weight Forward on Toes

Shifting weight to your toes overloads the kneecap and reduces glute involvement. Keep weight in your heels—you should be able to wiggle your toes.

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Favoring One Leg

It's natural to shift weight to your good leg, but this creates imbalance. Focus on equal weight distribution. Use a mirror to check.

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Rounding Your Back

Keep your chest up and core braced. Rounding your lower back puts stress on your spine and indicates you may be going too deep.

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Moving Too Fast

Slow, controlled movements build more strength and are safer. Try 2-3 seconds down, 1 second pause, 2 seconds up.

Sets, Reps & Frequency

Phase Depth Sets Reps Frequency
Week 4-6 30° 2-3 10 Daily
Week 6-8 45° 3 10-15 Daily
Week 8-12 60-70° 3 12-15 Daily
Month 3+ 90°+ 3-4 10-15 3-4x/week

Progress depth gradually based on your comfort, pain levels, and PT/surgeon guidance. Depth increases should be small (10-15 degrees at a time).

Variations & Progressions

Wall Squat (Supported)

Stand with your back against a wall. Slide down into your squat. The wall provides support and feedback on form. Great for beginners.

Beginner

Counter-Supported Squat

Hold onto a counter or sturdy chair. Use your arms as much as needed, gradually reducing assistance as you get stronger.

Beginner

Freestanding Mini Squat

No support—arms can be forward for counterbalance. This is the goal once you have good strength and balance.

Intermediate

Goblet Squat

Hold a dumbbell or kettlebell at your chest. The weight provides counterbalance and adds resistance. Progress depth as able.

Intermediate

Split Squat

One foot forward, one back in a staggered stance. More load on the front leg. A step toward lunges.

Intermediate

Full Squat / Barbell Squat

Full depth squat, eventually with added weight. This is a long-term goal—typically 4-6+ months post-op when fully cleared.

Advanced

Pro Tips

Mirror Check

Perform squats in front of a mirror to monitor knee alignment and equal weight distribution between legs.

Box Squat Target

Place a chair or box behind you at your target depth. Lightly touch it (don't sit) to ensure consistent depth.

Tempo Training

Try a 3-1-3 tempo: 3 seconds down, 1 second pause at bottom, 3 seconds up. Slower = more strength gains.

Track Your Progress

Note your depth, number of reps, and whether you used support. Celebrate when you can go deeper or do more reps!