Cam and Pincer Impingement Exercises: FAI Management Guide

Femoroacetabular impingement (FAI) occurs when abnormal bone shapes cause the hip joint to pinch during movement. Understanding whether you have cam, pincer, or mixed impingement helps guide which exercises will help and which movements to modify.

This guide covers type-specific strategies for managing FAI conservatively.

Understanding FAI Types

Cam Impingement

What it is: Extra bone on the femoral head (ball) creates a bump that jams into the socket during movement.

Who gets it: More common in young athletic males, often develops during adolescence.

Typical symptoms:

• Pain with hip flexion and internal rotation
• Groin pain during deep squats, sitting
• Pain after prolonged sitting
• Catching or locking sensation

Pincer Impingement

What it is: The acetabulum (socket) is too deep or tilted, overcovering the femoral head.

Who gets it: More common in middle-aged women.

Typical symptoms:

• Pain at extremes of motion
• Anterior hip/groin pain
• Pain with hip flexion
• May have less severe symptoms than cam

Mixed Impingement

What it is: Combination of both cam and pincer—the most common presentation (86% of FAI cases).

Symptoms: Features of both types.

General Principles for FAI Exercise

Positions That Often Aggravate:

• Deep hip flexion (>90°)
• Hip internal rotation at end range
• Combined flexion + adduction + internal rotation (FADIR)
• Deep squats
• Prolonged sitting

Positions That Often Feel Better:

• Neutral hip position
• Hip extension
• External rotation
• Standing and walking

The Goal:

Build hip strength and control while avoiding positions that cause impingement. This reduces symptoms and may delay or prevent surgery.

Phase 1: Pain Management and Mobility

Start here during flare-ups or if you're new to FAI exercise.

1. Hip Flexor Stretch (Modified for FAI)

Tight hip flexors increase anterior hip compression.

How to do it:

1. Half-kneeling position
2. Keep pelvis neutral (don't anteriorly tilt)
3. Shift weight forward slightly
4. Feel stretch in front of hip
5. Avoid going into deep hip flexion on front leg
6. Hold 30-45 seconds each side

2. Supine Hip External Rotation

Opens the joint in a safe position.

How to do it:

1. Lie on back, knees bent, feet flat
2. Let one knee fall out to the side
3. Use hand to gently increase rotation
4. Avoid forcing range
5. Hold 30 seconds each side

3. Prone Hip Internal Rotation

Gentle mobility in protected position.

How to do it:

1. Lie face down
2. Bend knee to 90°
3. Let foot fall outward (this is internal rotation)
4. Gentle stretch only—don't force
5. Hold 20-30 seconds each side

4. Quadruped Rocking (Limited Range)

Hip mobility without impingement.

How to do it:

1. On hands and knees
2. Rock back toward heels
3. Stop BEFORE you feel pinching (usually around 90° flexion)
4. Rock forward to starting position
5. 15-20 repetitions

Key: Find YOUR comfortable range, not full depth.

5. Supine Figure-4 Stretch (Modified)

Piriformis and external rotator stretch.

How to do it:

1. Lie on back
2. Cross ankle over opposite knee
3. Gently press knee away
4. DO NOT pull bottom thigh toward chest (avoid flexion)
5. Hold 30 seconds each side

Phase 2: Core and Hip Stability

Building control around the hip reduces abnormal forces.

6. Dead Bug (Hip-Safe Version)

Core stability without hip flexion stress.

How to do it:

1. Lie on back, knees bent, feet flat
2. Brace core, flatten lower back
3. Lift one foot slightly off floor
4. Extend opposite arm overhead
5. Return and switch
6. 10 reps each side

Key: Don't bring knees to chest—keep feet near floor level.

7. Side-Lying Hip Abduction

Strengthens gluteus medius without impingement.

How to do it:

1. Lie on side, bottom knee bent for stability
2. Top leg straight, slightly behind body
3. Lift top leg toward ceiling
4. Keep toe pointing forward or slightly down
5. Lower with control
6. 15-20 reps each side

8. Clamshells

External rotator and glute strength.

How to do it:

1. Lie on side, knees bent 45°
2. Keep feet together
3. Lift top knee, keeping feet touching
4. Don't let pelvis roll backward
5. 15-20 reps each side

9. Glute Bridge

Hip extension strength in safe position.

How to do it:

1. Lie on back, knees bent, feet flat
2. Drive through heels
3. Lift hips to form straight line
4. Squeeze glutes at top
5. Lower with control
6. 15-20 reps

10. Prone Hip Extension

Isolated glute max strengthening.

How to do it:

1. Lie face down
2. Keep knee straight
3. Lift entire leg toward ceiling
4. Don't arch lower back excessively
5. Hold 2-3 seconds
6. 15 reps each side

11. Bird-Dog

Core and hip stability together.

How to do it:

1. On hands and knees
2. Extend opposite arm and leg
3. Keep hips level
4. Hold 5 seconds
5. 10 reps each side

Phase 3: Functional Strengthening

Progress to these as pain decreases and control improves.

12. Romanian Deadlift (Hip Hinge)

Hip extension strength with safe mechanics.

How to do it:

1. Stand with feet hip-width
2. Soft knee bend
3. Hinge at hips, pushing butt back
4. Keep spine neutral
5. Go only as low as hamstring flexibility allows
6. Drive hips forward to stand
7. 12-15 reps

FAI note: This avoids deep flexion while building posterior chain.

13. Step-Ups

Functional leg strength.

How to do it:

1. Use low step (6-8 inches initially)
2. Step up, driving through working leg
3. Don't push off with back leg
4. Step down with control
5. 12-15 reps each side
6. Progress step height as tolerated

14. Split Squat (Limited Depth)

Single-leg strength without deep flexion.

How to do it:

1. Staggered stance
2. Lower until back knee approaches floor
3. Keep front shin relatively vertical
4. Don't let front knee collapse inward
5. Push through front heel to stand
6. 10-12 reps each side

15. Lateral Band Walks

Hip abductor strength in functional position.

How to do it:

1. Band around ankles or above knees
2. Slight squat position (not deep)
3. Sidestep maintaining tension
4. Keep toes forward
5. 15-20 steps each direction

16. Single Leg Romanian Deadlift

Advanced balance and hip strength.

How to do it:

1. Stand on one leg
2. Hinge forward, reaching opposite leg back
3. Keep hips level
4. Touch floor with fingertips or weights
5. Return to standing
6. 10 reps each side

Exercises to Avoid or Modify

Generally Avoid:

• Deep squats (past 90° hip flexion)
• Sumo squats/wide stance deep squats
• Full-depth lunges
• Pigeon pose (yoga)
• Frog stretch
• Hurdle stretch
• Butterfly stretch forcing knees down
• High box step-ups
• Exercises that cause groin pinching

Modify:

• Squats: Limit depth to comfortable range (often parallel or higher)
• Lunges: Don't go as deep
• Cycling: Raise seat height, avoid aggressive forward lean
• Yoga: Avoid deep hip openers
• Running: May be fine, but deep flexion movements (high knees) may aggravate

Cam-Specific Considerations

Cam impingement jams with internal rotation at flexion:

• Avoid exercises that combine flexion + internal rotation
• External rotation exercises are often helpful
• Hip flexor stretching important (reduces anterior compression)
• May tolerate extension-based exercises well

Pincer-Specific Considerations

Pincer impingement pinches at extremes of motion:

• Avoid end-range positions in any direction
• Mid-range exercises well-tolerated
• Less restriction on movement patterns than cam
• Focus on motor control and stability

Daily Exercise Program

Morning (7 minutes):

1. Hip flexor stretch: 30 sec each side
2. Supine external rotation: 30 sec each
3. Quadruped rocking (limited): 15 reps
4. Glute bridges: 15 reps
5. Clamshells: 15 reps each side

Midday (3 minutes):

1. Standing hip circles (gentle): 10 each direction
2. Hip flexor stretch: 20 sec each
3. Glute squeezes: 10 reps

Evening (15 minutes):

1. Full mobility routine (Phase 1 exercises)
2. Strengthening circuit:
   • Side-lying abduction: 15 reps each
   • Bird-dog: 10 reps each
   • Romanian deadlift: 12 reps
   • Split squat: 10 reps each
   • Lateral band walks: 15 steps each way
3. Hip flexor stretch to finish

Lifestyle Modifications

Sitting

• Avoid low chairs/couches
• Use higher seat height
• Stand every 30 minutes
• Avoid crossing legs

Sleeping

• Side-lying with pillow between knees
• Avoid fetal position (excessive flexion)
• Back sleeping may be comfortable

Driving

• Move seat back to reduce hip flexion
• Frequent stops on long drives

When to Seek Medical Care

See a doctor if:

• Pain significantly limits daily activities
• Catching or locking worsening
• Night pain disturbing sleep
• Conservative treatment not helping after 3-6 months

Surgery consideration:

• FAI surgery (arthroscopy) can reshape bone to eliminate impingement
• Best results when labrum and cartilage still healthy
• Conservative treatment should be tried first in most cases

Key Takeaways

1. Know your type — Cam, pincer, or mixed affects exercise selection
2. Avoid the pinch zone — Deep flexion + internal rotation
3. Strengthen around the hip — Glutes, core, hip stabilizers
4. Modify, don't quit — Most activities can be adapted
5. Extension exercises help — Glute work, hip hinges, bridges
6. Conservative care works — Many people manage without surgery

FAI doesn't mean giving up activity—it means being smart about movement. With consistent strength work, appropriate modifications, and avoiding positions that cause impingement, many people live active, pain-free lives without surgery.