Patellar Tendon Rupture Exercises: Post-Surgery Recovery Guide

A patellar tendon rupture disconnects the kneecap from the shinbone, making it impossible to straighten your knee against gravity. This devastating injury almost always requires surgical repair, followed by months of careful rehabilitation to restore the extensor mechanism and rebuild strength.

Understanding Patellar Tendon Rupture

Anatomy

The patellar tendon:

• Connects patella (kneecap) to tibial tubercle (shin)
• Part of the extensor mechanism (quads → quad tendon → patella → patellar tendon → tibia)
• Transmits quadriceps force to straighten knee
• Essential for walking, stairs, running, jumping

How It Happens

• Sudden forceful contraction (landing from jump, catching yourself)
• Direct trauma to tendon
• Often with pre-existing tendinopathy
• More common in younger, active individuals (<40)
• Risk factors: patellar tendinitis history, steroid injections, systemic diseases

Surgical Repair

• Tendon reattached to patella with sutures
• May use drill holes through patella or anchors
• Often augmented with cerclage wire or suture
• Must be protected during healing

Healing Timeline

Tendon healing:

• Weeks 0-6: Initial attachment, extremely fragile
• Weeks 6-12: Strengthening bond
• Weeks 12-24: Maturing repair
• 6-12 months: Full healing and strength

Critical point: The repair is weakest when pain is decreasing. Respect restrictions.

Phase 1: Maximum Protection (Weeks 0-6)

Immobilization

• Knee immobilizer or brace LOCKED at 0° (full extension)
• Weight-bearing as tolerated in locked brace
• NO active knee flexion
• Brace worn 24/7 except for specific exercises

Goals:

• Protect surgical repair
• Prevent quad atrophy
• Control swelling

1. Quad Sets

Critical—start immediately.

How to do it:

1. Lie or sit with knee straight in brace
2. Tighten quadriceps muscle
3. Push back of knee toward floor
4. Hold 5-10 seconds
5. 20-30 repetitions
6. Every 1-2 hours while awake

2. Ankle Pumps

How to do it:

1. Move ankle up and down vigorously
2. 20-30 repetitions
3. Every hour
4. Prevents blood clots

3. Straight Leg Raise (When Approved)

Usually started week 2-4 per surgeon.

How to do it:

1. Lie on back, brace locked
2. Tighten quad completely (lock knee)
3. Lift entire leg 8-12 inches
4. Hold 5 seconds
5. Lower slowly
6. 3 sets x 10-15 reps

Critical: Knee MUST stay locked straight. If it bends, don't do this yet.

4. Hip Exercises

Side-lying abduction:

1. Lie on uninvolved side
2. Keep brace on, knee straight
3. Lift top leg toward ceiling
4. 3 sets x 15 reps

Prone hip extension:

1. Lie face down
2. Lift entire leg (knee stays straight)
3. 3 sets x 15 reps

5. Upper Body and Core

Maintain fitness without stressing knee:

• Upper body resistance training
• Arm bike for cardio
• Core exercises (avoid hip flexion that bends knee)

Phase 2: Early ROM (Weeks 6-12)

Brace Changes

• Brace unlocked for ROM exercises
• Progressive flexion limits per surgeon
• Typical: 30° → 60° → 90° → 120° over weeks
• Still locked for walking initially

Goals:

• Begin knee flexion carefully
• Continue quad activation
• Progress weight-bearing

6. Passive Knee Flexion

How to do it:

1. Sit on edge of bed/table
2. Let gravity bend knee
3. Go ONLY to prescribed limit
4. 15-20 reps
5. Multiple times daily

Typical progression:

• Week 6-7: 0-30°
• Week 8-9: 0-60°
• Week 10-11: 0-90°
• Week 12: 0-120°

7. Heel Slides (Assisted)

How to do it:

1. Lie on back
2. Slide heel toward buttock
3. Stay within allowed ROM
4. Use strap to assist if needed
5. 15-20 reps

8. Wall Slides

How to do it:

1. Lie on back, feet on wall
2. Slide feet down (knees bend)
3. Stay within allowed range
4. 15-20 reps

9. Stationary Bike

Usually week 8-10, per surgeon.

How to do it:

1. Very high seat to limit flexion
2. Partial revolutions initially
3. No resistance
4. Progress as ROM improves

10. Pool Exercises

When incision healed:

• Walk in chest-deep water
• Knee bends within allowed ROM
• Excellent protected environment

Phase 3: Progressive Strengthening (Weeks 12-20)

Goals:

• Achieve full ROM
• Progressive quad strengthening
• Return to functional activities

11. Active Knee Extension

How to do it:

1. Sit with knee bent
2. Straighten knee using quads
3. Hold 5 seconds at full extension
4. Lower slowly
5. 3 sets x 15 reps
6. Add ankle weight to progress

12. Terminal Knee Extension

How to do it:

1. Towel roll under knee
2. Press down into towel
3. Lift foot (straighten knee)
4. Hold 5 seconds
5. 3 sets x 15 reps

13. Leg Press (Light)

How to do it:

1. Start very light
2. Progress range gradually
3. 3 sets x 12-15 reps
4. Progress weight slowly

14. Step-Ups

How to do it:

1. Low step (4 inches)
2. Step up with affected leg
3. Control descent
4. 3 sets x 12-15 reps
5. Progress height

15. Mini Squats

How to do it:

1. Partial squat (45-60°)
2. Progress depth gradually
3. 3 sets x 15 reps

16. Single-Leg Balance

How to do it:

1. Stand on affected leg
2. Hold 30-60 seconds
3. Progress: eyes closed, unstable surface

Phase 4: Advanced Strengthening (Weeks 20+)

Goals:

• Full strength restoration
• Prepare for sport/activity return
• Power development

17. Full Squats

How to do it:

1. Progress to full depth
2. Add weight as tolerated
3. 3 sets x 10-12 reps

18. Lunges

Progress through:

1. Stationary
2. Walking
3. Lateral
4. 3 sets x 10 each leg

19. Step-Downs (Eccentric)

How to do it:

1. Stand on step (6-8 inches)
2. Lower opposite foot slowly
3. Control with affected leg
4. 3 sets x 10-12 reps

20. Single-Leg Press

How to do it:

1. Single leg on leg press
2. Full ROM
3. Progressive weight
4. 3 sets x 10-12 reps

Phase 5: Return to Activity (6-12 Months)

21. Running Progression

Usually 6+ months post-op.

Progress through:

1. Fast walking
2. Walk/jog intervals
3. Continuous jogging
4. Running
5. Sprinting (when ready)

22. Plyometrics

Usually 9+ months post-op.

Progress through:

1. Two-leg jumping
2. Single-leg hopping
3. Box jumps
4. Sport-specific jumping

23. Sport-Specific Training

• Based on individual goals
• Progress gradually
• May take 9-12+ months

Return Criteria

Before returning to sport:

1. Full pain-free ROM
2. Quad strength >85% of other leg
3. Single-leg hop >85% of other leg
4. Pass sport-specific functional tests
5. Surgeon clearance

Warning Signs

Contact surgeon immediately:

• Sudden loss of ability to straighten knee
• Popping with loss of extension strength
• Significant increase in pain/swelling
• Signs of infection

Key Takeaways

1. Protect the repair — First 12 weeks are critical
2. Quad sets from day one — Maintains muscle activation
3. ROM per protocol — Don't rush flexion
4. SLR is a milestone — Indicates repair is holding
5. Full recovery: 9-12 months — Athletes need patience
6. Re-rupture risk is real — Respect restrictions

Patellar tendon rupture recovery is a marathon, not a sprint. The repair must heal solidly before progressive loading, and the quadriceps must rebuild strength over many months. Follow your surgeon's protocol exactly, do your exercises consistently, and you'll maximize your chances of returning to full activity.