Running is one of the most accessible and effective forms of exercise available. However, that post-run “high” can quickly turn into a sharp or aching pain at the front or side of your knee, turning a smooth stride into a frustrating walk home.

If you are dealing with knee pain during or after running, you aren’t alone. “Runner’s knee” is one of the most common overuse injuries in active adults. While traditional approaches like rest, ice, or over-the-counter pain relievers may offer temporary relief, they rarely address the underlying movement dysfunctions that caused the pain in the first place.

At Threshold PT, we use an active, evidence-based approach to resolve runner’s knee—getting you back to the mileage you love without pain.

What Is Runner’s Knee?

“Runner’s knee” is an umbrella term used to describe pain around or behind the kneecap (patella) or along the outside of the knee joint. While common in runners, it can also affect cyclists, walkers, and field athletes.

The two most common conditions that fall under the runner’s knee umbrella are:

1. Patellofemoral Pain Syndrome (PFPS): Pain located directly behind or around the kneecap.
2. Iliotibial Band Friction Syndrome (ITBFS): Pain felt along the outside (lateral) aspect of the knee.

Understanding the Two Main Causes

1. Patellofemoral Pain Syndrome (PFPS)

The patellofemoral joint consists of your kneecap (patella) sliding within a groove on your thigh bone (femur). As you bend and straighten your knee, the kneecap should glide smoothly in a subtle C-shaped path.

When the muscles supporting your hip, quad, and foot are out of balance, the kneecap can pull off-center—a concept known as patellar maltracking. This creates excessive pressure on the joint cartilage behind the kneecap, leading to irritation during stairs, squatting, or running.

2. Iliotibial Band Friction Syndrome (ITBFS)

The IT band is a thick strip of fascia that runs down the outside of your thigh, connecting muscles like the gluteus maximus and tensor fascia lata (TFL) to your shin bone.

Unlike muscle tissue, the IT band does not contract on its own. When the attaching hip muscles are weak or overly tight, they pull the IT band taut, causing repetitive friction and irritation along the outside of the knee joint during continuous knee flexion and extension.

Common Risk Factors for Runner’s Knee

Runner’s knee is rarely caused by a single issue; it is usually the result of a combination of structural and biomechanical factors:

• Weak Hip Abductors & Rotators: When the gluteus medius is weak, the thigh bone caves inward (dynamic knee valgus) during foot strike.
• Excessive Foot Pronation: Over-pronation causes the shin bone to rotate inward, placing extra rotational torque on the knee.
• Training Errors: Increasing weekly mileage too quickly, running downhill, or introducing sudden hill workouts without adequate progression.
• Poor Running Mechanics: Low step cadence or over-striding (landing with the foot too far in front of the body).

Key Exercises for Runner’s Knee Recovery

To resolve runner’s knee for good, rehabilitation must focus on strengthening the hip stabilizers, improving motor control, and optimizing lower-body flexibility.

Soft Tissue Myth Busted: Should You Foam Roll Your IT Band?

No—foam rolling your IT band directly is largely ineffective and often painful.

Because the IT band is a dense, fibrous connective tissue, you cannot “release” or stretch it with a foam roller. Instead, focus your foam rolling on the contractile muscles that attach to the IT band:

• Tensor Fascia Lata (TFL): Rolling the front-outside pocket of your hip.
• Gluteus Maximus & Medius: Target the side and back of your hip.
• Vastus Lateralis: Roll the outer portion of your quadriceps.

Rolling these surrounding tissues helps reduce muscle tension and desensitizes the area, making your strength training far more effective.

Key Takeaways for Runner’s Knee Relief

1. Find the root cause: Runner’s knee is often a symptom of hip weakness or foot mechanics, not a problem with the knee itself.
2. Avoid “running through the pain”: Modifying your mileage early prevents acute irritation from becoming a chronic injury.
3. Strengthen the glutes: Targeted hip abductor and external rotator training protects the kneecap from maltracking.
4. Fix your running form: Subtle tweaks to cadence and stride length deliver massive relief to the patellofemoral joint.