Knee Pain When Running? Why Treating Just Your Knee Won't Work

You're a few miles into your run when you feel it: pain around your kneecap, or maybe on the outside of your knee. You try adjusting your stride, slowing down, or taking a few days off, but when you return to running, the pain comes back.

If this sounds familiar, you've probably tried knee sleeves, ice, rest, maybe even knee-specific exercises. But here's what most runners don't realize: in the majority of cases, knee pain during running isn't actually a knee problem. It's a hip problem that shows up at your knee.

At Nashville Physical Therapy & Performance, we evaluate runners with knee pain every single week during spring marathon training season. And the pattern is remarkably consistent: weak or poorly functioning hips create abnormal knee mechanics, which leads to pain. Treating the knee alone rarely works because you're not addressing the cause.

Let's talk about why knee pain happens during running, why your hips are likely the problem, and what actually fixes it.

Knee Pain When Running? Why Treating Just Your Knee Won't Work:

The Most Common Types of Running-Related Knee Pain

Knee pain in runners typically presents in one of three patterns, and all three share a common root cause: poor hip control.

Runner's Knee (Patellofemoral Pain Syndrome)

This is pain around or behind the kneecap, often described as a dull, achy discomfort. It typically worsens during running, going downstairs, or after sitting for long periods with your knee bent.

IT Band Syndrome

Pain on the outside (lateral side) of the knee, often sharp or burning, that typically appears after a certain distance and worsens with continued running.

Patellar Tendonitis (Jumper's Knee)

Pain just below the kneecap at the patellar tendon insertion. Often worse when pushing off during running or with explosive movements.

While these conditions have different specific mechanisms, research shows that all three are strongly associated with weak hip abductors and poor hip control.[^1]

Why Hip Weakness Shows Up as Knee Pain

Your knee is a hinge joint designed to bend and straighten. It has very limited side-to-side motion. When you run, your hip is responsible for controlling your leg position in space and preventing your knee from collapsing inward.

Here's what happens when your hips are weak:

During foot strike:

1. Your hip abductors (gluteus medius and minimus) should fire to stabilize your pelvis

2. If they're weak, your pelvis drops on the stance leg side

3. This causes your femur (thigh bone) to rotate inward

4. Your knee collapses inward (called dynamic knee valgus)

5. This misalignment puts abnormal stress on your kneecap, patellar tendon, or IT band

6. Over thousands of steps, this repetitive stress creates pain
   

Your knee is doing its job perfectly. It's your hip that's failing to control the movement properly.

The Self-Assessment: Is Your Hip the Problem?

Try these three tests to determine if hip weakness is contributing to your knee pain:

Test 1: Single-Leg Stand Test

Stand on your affected leg for 30 seconds. Watch yourself in a mirror from the front.

What to look for:

• Does your pelvis drop on the non-stance side?

• Does your knee drift inward toward your midline?

• Do you feel your hip muscles fatiguing quickly or shaking?
  

If any of these occur, you have inadequate hip control.

Test 2: Single-Leg Squat Test

Stand on your affected leg. Slowly squat down about 30-45 degrees (just a small bend), then return to standing. Do 10 reps while watching yourself in a mirror.

What to look for:

• Does your knee collapse inward during the squat?

• Does your knee travel past your toes excessively?

• Does your pelvis rotate or tilt to one side?

• Do you feel unsteady or need to use your arms for balance?
  

Any of these indicate poor hip strength and control.

Test 3: Step-Down Test

Stand on a step (about 8 inches high) on your affected leg. Slowly lower your opposite heel toward the ground, then return to the starting position. Do 10 reps.

What to look for:

• Does your knee dive inward as you lower down?

• Does your pelvis drop significantly on the lowering leg side?

• Can you control the movement smoothly, or do you drop quickly?
  

This test reveals hip control during eccentric loading, which mirrors the demands of running.

If you struggled with any of these tests, weak hips are almost certainly contributing to your knee pain.

Why Spring Running Makes Knee Pain Worse

April isn't random timing for knee pain. Several factors make spring particularly problematic:

Rapid Mileage Increases: Your cardiovascular system adapts quickly to increased running volume. Your muscles adapt moderately quickly. But your hip stabilizers, if they've been undertrained all winter, can't keep up with rapid volume increases. By mile 5 of a long run, your hips fatigue, your form breaks down, and your knees pay the price.

Hills and Speed Work: Both require greater hip control than easy running on flat surfaces. Adding these training elements without adequate hip strength creates the perfect storm for knee pain.

Surface Changes: Transitioning from treadmills to pavement or trails changes the stability demands on your hips. Uneven surfaces require constant micro-adjustments that expose hip weakness.

Accumulated Fatigue: Running 5-6 days per week without adequate recovery doesn't give your hip stabilizers time to rebuild between sessions. Chronic fatigue accumulates, hip control deteriorates, and knee pain develops.

What Doesn't Work (And Why You've Probably Tried It)

Most runners with knee pain try these approaches first:

Knee Braces or Sleeves: These might provide temporary comfort by compressing the area and providing proprioceptive feedback, but they don't address hip weakness. The pain returns when you remove the brace.

Rest Alone: Taking a week or two off might reduce inflammation, but it doesn't fix the hip control problem. When you return to running with the same weak hips, the pain comes back.

Quad Strengthening Only: While quad strength matters, focusing only on the knee without addressing the hip misses the root cause. You might build stronger quads, but if your hip can't control your leg position, your knee still gets overloaded.

Just Running Through It: Pain is a signal, not a weakness to overcome. Running through knee pain without addressing hip control progressively damages knee structures and can lead to chronic issues.

What Actually Works: Hip-Focused Treatment

Fixing running-related knee pain requires addressing hip strength, control, and running mechanics:

1. Hip Strengthening Exercises

Side-Lying Hip Abduction Lie on your side with your bottom leg bent. Keep your top leg straight and lift it toward the ceiling, leading with your heel. Focus on using your hip, not momentum. Lower slowly.

Clamshells Lie on your side with knees bent at 90 degrees. Keep feet together and lift your top knee toward the ceiling while keeping your pelvis stable. This isolates your gluteus medius.

Single-Leg Bridge Lie on your back with one foot flat on the ground, other leg extended. Press through your planted foot to lift your hips while keeping them level. This builds glute strength in a functional pattern.

Monster Walks with Resistance Band Place a resistance band around your ankles. Maintain a slight squat and walk diagonally forward and backward, keeping tension on the band and preventing your knees from collapsing inward.

2. Single-Leg Balance and Stability Work

Progressive Balance Training:

• Week 1: Single-leg balance on firm surface (30-60 seconds per side)

• Week 2: Single-leg balance with eyes closed

• Week 3: Single-leg balance on unstable surface (foam pad or balance disc)

• Week 4: Single-leg balance with movement (reaching, catching ball, etc.)
  

This trains the neuromuscular control needed for running.

3. Running Gait Modifications

Increase Cadence: Taking shorter, quicker steps (170-180 steps per minute) reduces knee loading and impact forces. Count your steps for 30 seconds and multiply by two. If you're below 165, gradually increase by 5% each week.

Run Softer: Focus on landing quietly rather than pounding the pavement. This naturally reduces impact forces on your knees.

Avoid Overstriding: Landing with your foot far in front of your body increases braking forces and knee stress. Aim to land with your foot closer to your center of mass.

The Return-to-Running Protocol

Once you've identified hip weakness, here's how to modify your training while building strength:

Week 1-2:

• Reduce running volume by 40-50%

• Run on flat surfaces only

• Increase cadence by 5%

• Do hip strengthening daily

• Cross-train with cycling or swimming to maintain fitness
  

Week 3-4:

• Gradually increase running by 10-15% per week if pain is improving

• Continue hip strengthening 5-6 times per week

• Add gentle hills if pain-free on flat runs

• Monitor knee pain levels: stay below 3/10 during runs
  

Week 5-6:

• Return to normal mileage if pain has resolved

• Reduce hip strengthening to 3-4 times per week for maintenance

• Reintroduce speed work gradually if appropriate

• Continue monitoring form and fatigue levels
  

If knee pain persists despite 3-4 weeks of consistent hip strengthening and training modifications, professional evaluation is needed.

When Knee Pain Needs Professional Evaluation

Seek evaluation from a physical therapist if:

• Knee pain persists beyond 3-4 weeks despite hip strengthening

• You have swelling in your knee

• Your knee gives out or feels unstable

• You hear or feel clicking, popping, or grinding with pain

• Pain is severe enough to alter your walking gait

• You've had previous knee injuries

• You're unsure if hip weakness is the primary issue
  

At Nashville Physical Therapy & Performance, we thoroughly assess your running mechanics, test hip and knee strength, identify movement compensations, and create a personalized treatment plan that addresses your specific deficits.

Knee Pain When Running? Why Treating Just Your Knee Won't Work: The Bottom Line

Knee pain when running is frustrating, especially when rest and knee-focused treatments don't help. But in most cases, the problem isn't your knee at all. Weak or poorly functioning hips create abnormal knee mechanics, which leads to pain.

The good news? Hip strength responds well to targeted exercises, and most runners see significant improvement within 3-4 weeks of consistent strengthening work combined with smart training modifications.

Stop treating just your knee. Address the hip control problem, and your knee pain will likely resolve as a result.

Knee pain limiting your spring training? Schedule a movement assessment at Nashville Physical Therapy & Performance. We'll evaluate your hip strength, assess your running mechanics, and create a targeted plan to address the root cause of your knee pain. Call us at 615-428-9213 or book online at nashvillept.com.

References

[^1]: Souza RB, Powers CM. Differences in hip kinematics, muscle strength, and muscle activation between subjects with and without patellofemoral pain. Journal of Orthopaedic & Sports Physical Therapy. 2009;39(1):12-19.