Knock Knee Exercises: Strengthen and Align Your Legs

Knock knees (genu valgum)—when the knees angle inward and touch while the ankles remain apart—can cause knee pain, hip issues, and problems up and down the kinetic chain. While severe structural cases may need medical intervention, many people with mild to moderate knock knees can improve alignment and reduce symptoms through targeted exercises.

Understanding Knock Knees

What's happening:

• Knees angle toward midline
• Ankles remain separated when knees touch
• Often accompanied by foot pronation (flat feet)
• May be structural (bone) or functional (muscle imbalance)

Common causes:

• Weak hip abductors (glute medius)
• Tight adductors (inner thigh)
• Weak external hip rotators
• Flat feet or overpronation
• Obesity
• Some developmental conditions
• Normal in children (usually resolves by age 7)

Associated problems:

• Knee pain (especially patellofemoral)
• IT band syndrome
• Hip pain
• Ankle problems
• Increased ACL injury risk
• Early knee arthritis

Assessment

Standing Test

1. Stand with feet together
2. Note if knees touch before ankles
3. Measure gap between ankles when knees touch
4. Check if one side worse than other

Single Leg Squat Test

1. Stand on one leg
2. Slowly squat down
3. Watch knee in mirror
4. Knock knee pattern: Knee dives inward

Walking/Running Assessment

1. Watch knee position during gait
2. Note if knees collapse inward at any point
3. Video from front is helpful

Phase 1: Release Tight Muscles

Adductor (Inner Thigh) Foam Rolling

1. Lie face down
2. One leg out to side, bent at 90°
3. Roller under inner thigh
4. Roll from knee toward groin
5. 2-3 minutes each leg

IT Band Foam Rolling

1. Side-lying on roller
2. Roller under outer thigh
3. Roll from hip to just above knee
4. 2-3 minutes each side

Hip Flexor Release

1. Face down, ball under front of hip
2. Find tender spots
3. Hold 30-60 seconds
4. Breathe deeply

Phase 2: Stretch Tight Muscles

Adductor Stretch (Seated)

1. Sit tall, soles of feet together
2. Knees out to sides
3. Lean forward from hips
4. Hold 30-60 seconds

Adductor Stretch (Side Lunge)

1. Wide stance
2. Shift weight to one side
3. Bend that knee
4. Keep other leg straight
5. Hold 30 seconds each side

Frog Stretch

1. On hands and knees
2. Spread knees wide apart
3. Feet turned out
4. Sit back toward heels
5. Hold 30-60 seconds

90/90 Stretch

1. Sit with front leg bent 90° in front
2. Back leg bent 90° to side
3. Sit tall
4. Lean forward over front leg
5. Hold 30 seconds each side

Phase 3: Strengthen Weak Muscles

Hip Abductor Exercises

Clamshells

1. Side-lying, knees bent 45°
2. Keep feet together
3. Lift top knee toward ceiling
4. Don't let hips roll back
5. 3 sets of 15 each side

Side-Lying Hip Abduction

1. Side-lying, bottom knee bent
2. Top leg straight, slightly behind
3. Lift top leg toward ceiling
4. Don't rotate hip forward
5. 3 sets of 15 each side

Banded Lateral Walks

1. Band around ankles or above knees
2. Quarter squat position
3. Step sideways
4. Keep tension on band
5. 20 steps each direction

Monster Walks

1. Band around ankles
2. Quarter squat
3. Walk forward at 45° angles
4. Maintain band tension
5. 20 steps

Hip External Rotation Exercises

Clamshells (already listed)

Seated External Rotation

1. Sit on chair, feet flat
2. Band around outside of knees
3. Push knees apart against band
4. Hold 5 seconds
5. 3 sets of 15

Fire Hydrants

1. On hands and knees
2. Lift knee out to side
3. Keep 90° bend at knee
4. 3 sets of 12 each side

Glute Strengthening

Glute Bridges

1. Lie on back, knees bent
2. Band above knees (push out against it)
3. Lift hips
4. Squeeze glutes at top
5. 3 sets of 15

Single Leg Glute Bridge

1. Same as above
2. Extend one leg
3. Bridge on one leg
4. Keep hips level
5. 3 sets of 10 each side

Hip Thrusts

1. Upper back on bench
2. Band above knees
3. Feet flat on floor
4. Drive hips up
5. Keep knees pushed out
6. 3 sets of 12

Phase 4: Movement Retraining

Wall Squat with Ball

1. Stand with back against wall
2. Small ball between knees
3. Squat down
4. Push knees into ball
5. Practice correct knee tracking
6. 3 sets of 12

Bodyweight Squat with Band

1. Band above knees
2. Stand shoulder-width apart
3. Squat down
4. Push knees OUT against band
5. Watch knees track over toes
6. 3 sets of 12

Single Leg Squat to Box

1. Stand on one leg in front of box/chair
2. Slowly lower to sit
3. Focus on keeping knee over foot
4. Stand up
5. Watch in mirror—no knee cave
6. 3 sets of 8 each leg

Step Downs with Control

1. Stand on step (6-8 inches)
2. Slowly lower opposite foot to floor
3. Keep stance knee tracking over foot
4. Tap floor and return
5. 3 sets of 10 each leg

Walking with Awareness

1. Walk slowly
2. Think about pushing knees slightly outward
3. Don't let knees collapse inward
4. Practice 5 minutes daily

Foot Considerations

Flat feet contribute to knock knees. Address both:

Arch Strengthening

1. Short foot exercise (foot doming)
2. Towel scrunches
3. Marble pickups
4. See flat feet exercises

Footwear

• Shoes with arch support
• Consider orthotics if significant pronation
• Avoid completely flat shoes

Daily Routine

Morning (10 minutes)

1. Clamshells (2 min each side)
2. Monster walks (3 min)
3. Glute bridges with band (3 min)

During Day

1. Awareness during walking
2. Don't stand with knees locked inward
3. Squeeze glutes periodically

Evening (15 minutes)

1. Foam rolling (5 min)
2. Adductor and hip stretches (4 min)
3. Full strengthening routine (6 min)

Exercise Modifications

During Squats

• Use band above knees
• Think "knees out"
• Don't go deep if form breaks down
• Start with box squats

During Lunges

• Watch front knee in mirror
• Keep it tracking over foot
• Use lighter weights until form is solid

During Running

• Shorten stride initially
• Focus on knee alignment
• May need gait retraining with professional

Progress Timeline

Week 1-2: Learn exercises, build awareness Week 3-4: Notice improved muscle activation Month 2: Better control during squats Month 3-6: Visible alignment improvement Ongoing: Maintenance required

When to Seek Help

See a doctor or physical therapist if you have:

• Significant pain with activity
• Very severe knock knees (large ankle gap)
• One leg much worse than other
• No improvement after 2-3 months
• History of knee surgery or injury

They may recommend:

• Custom orthotics
• Bracing
• More intensive PT
• Surgical evaluation (rare, severe cases)

What's Realistic

Exercise CAN:

• Strengthen muscles that control alignment
• Improve functional knee tracking
• Reduce symptoms and pain
• Prevent worsening
• Improve movement patterns

Exercise CANNOT:

• Change bone structure
• Fix severe skeletal deformity
• Work overnight

Most functional knock knees respond well to consistent strengthening of the hip abductors and external rotators. The key is building strength AND movement awareness so the knees track properly during daily activities and exercise.