Recovery Insights Blog | Foundational Rehab

The Most Common Running Complaint

Runner's knee—officially called patellofemoral pain syndrome (PFPS)—is the single most common running injury, affecting up to 25% of runners. But you don't have to be a runner to get it. Cyclists, hikers, and anyone who sits for long periods can develop that nagging ache around the kneecap.

The good news: it's very treatable without surgery. The challenge is that it requires patience and consistency.

What's Happening

Patellofemoral pain involves the kneecap (patella) and the groove it slides in on the thighbone (femur). When the patella doesn't track smoothly in this groove, or when there's increased stress on the joint, pain develops.

Contributing factors:

Weakness in the quadriceps, especially the VMO (inner quad)

Weak hip muscles, particularly glutes

Tight quads, IT band, or hip flexors

Overpronation of the feet

Training errors (too much, too soon)

Prolonged sitting with knees bent

Poor movement patterns

It's usually not one thing but a combination of factors.

Symptoms

Aching pain around or behind the kneecap

Pain worse with stairs (especially going down)

Pain with prolonged sitting ("movie theater sign")

Pain with squatting, lunging, or kneeling

Pain during or after running

Possible grinding or clicking sensation

Stiffness after sitting

What Makes It Worse

Running (especially hills and speed work)

Stairs, particularly descending

Prolonged sitting with bent knees

Deep squats and lunges

Kneeling

Sudden increases in training volume

Phase 1: Pain Management (Weeks 1-2)

Reduce aggravating activities:

Reduce running volume (don't necessarily stop completely)

Avoid deep squats and lunges

Take breaks from prolonged sitting

Avoid stairs when possible

Pain relief:

Ice after activity (15-20 minutes)

NSAIDs short-term if needed

Patellar taping (McConnell technique) may help

Maintain fitness:

Pool running

Swimming

Cycling (if pain-free—adjust seat height if needed)

Upper body training

Phase 2: Address the Causes (Weeks 1-6)

Quadriceps Strengthening

The quads control the patella. Weakness, especially in the VMO, contributes to poor tracking.

Straight leg raises:

1. Lie on back, one knee bent, other leg straight

2. Tighten thigh, rotate foot outward slightly

3. Lift leg 6-8 inches

4. Hold 3 seconds, lower slowly

5. 3 sets of 15 each side

Terminal knee extensions:

1. Loop band around anchor and behind knee

2. Start with knee slightly bent

3. Straighten knee against resistance

4. 3 sets of 15

Wall sits:

1. Back against wall, lower to 45-degree knee bend

2. Don't go below 90 degrees

3. Hold 30-60 seconds

4. Progress time gradually

Step-ups (controlled):

1. Step up onto 4-6 inch step

2. Control the descent

3. Keep knee aligned over toes

4. 3 sets of 10 each side

5. Progress step height gradually

Hip Strengthening

Weak hips, especially glutes, cause the knee to collapse inward, increasing patella stress.

Clamshells:

1. Lie on side, knees bent 45 degrees

2. Keep feet together, lift top knee

3. Don't rotate pelvis back

4. 3 sets of 15-20 each side

Side-lying hip abduction:

1. Lie on side, bottom knee bent, top leg straight

2. Lift top leg toward ceiling

3. Toes pointing slightly down

4. 3 sets of 15-20 each side

Glute bridges:

1. Lie on back, knees bent, feet flat

2. Squeeze glutes, lift hips

3. 3 sets of 15

4. Progress to single-leg

Monster walks:

1. Band around ankles or above knees

2. Quarter-squat position

3. Walk sideways, maintaining tension

4. 2-3 sets of 15 steps each direction

Single-leg balance:

1. Stand on one leg

2. Hold 30 seconds

3. Progress to eyes closed, unstable surface

Flexibility Work

Tight muscles can alter patella tracking.

Quad stretch:

1. Stand, pull heel toward buttock

2. Keep knees together, pelvis neutral

3. Hold 30 seconds each side

IT band foam rolling:

1. Lie on side, roller under outer thigh

2. Roll from hip to just above knee

3. Avoid rolling directly on knee

4. 1-2 minutes each side

Hip flexor stretch:

1. Half-kneeling position

2. Tuck tailbone, lean forward slightly

3. Hold 30 seconds each side

Phase 3: Functional Progression (Weeks 4-8)

As pain decreases, progress to more functional movements:

Squats (controlled range):

1. Start with partial squats (quarter to half)

2. Focus on knees tracking over toes

3. Don't let knees cave inward

4. Progress depth as tolerated

Step-downs:

1. Stand on step, lower opposite foot to floor

2. Control the descent (4 seconds)

3. Tap floor, return to start

4. 3 sets of 10 each side

5. Progress step height

Single-leg squats (partial):

1. Stand on one leg

2. Squat down as far as pain-free

3. Keep knee aligned over toes

4. 3 sets of 8-10 each side

Lunges (forward and reverse):

1. Start with body weight

2. Controlled movement

3. Knee should not go past toes

4. Progress to walking lunges

Return to Running

Once you've built strength and exercises are pain-free:

Week 1-2: Walk-run intervals (run 1 min, walk 2 min)

Week 3-4: Increase running intervals

Week 5-6: Continuous easy running, short duration

Week 7+: Gradually increase duration and add intensity

Rules:

Pain should stay below 3/10 during running

No increased pain the next day

If pain increases, step back a phase

Add hills and speed work last

Other Helpful Interventions

Footwear:

Supportive running shoes

Consider motion control if you overpronate

Replace shoes every 300-500 miles

Orthotics:

May help if you have significant pronation

Over-the-counter often sufficient

Custom if needed

Patellar taping:

McConnell taping can reduce pain during activity

Learn technique from a physio, or use patellar straps

Running form:

Increase cadence (reduces load per stride)

Avoid overstriding

Consider gait analysis

Timeline

Mild cases: 4-6 weeks

Moderate cases: 6-12 weeks

Chronic cases: 3-6 months

Patience is essential. Pushing through pain delays recovery.

Prevention

Hip and quad strengthening 2-3x weekly

Gradual training increases (10% rule)

Proper footwear

Address flexibility limitations

Cross-train to reduce running load

Don't ignore early warning signs

The Bottom Line

Runner's knee is a strength and control problem, not a "wear and tear" or structural problem. Build strong quads and hips, address flexibility issues, and return to running gradually.

The exercises work—but only if you do them consistently. Make hip and knee strengthening a permanent part of your routine.

Runner's Knee: Why Your Kneecap Hurts and How to Fix It