Knee pain is one of the most common issues that sideline runners and other athletes, but not all knee pain is caused by diagnosable tissue damage. This can be frustrating, especially if it is limiting your ability to participate in daily activities or athletic pursuits, only to hear from a healthcare provider that your ACL is fine, your menisci look great, and there are no signs of arthritis.
For physical therapists, ruling out these conditions often leads to a diagnosis of exclusion—a diagnosis made in the absence of evidence for other problems.
What is Anterior Knee Pain?
Anterior knee pain refers to pain at the front of the knee, around or behind the kneecap. It has gone by several names over the years, including:
- Osteochondral malacia patella
- Patellofemoral pain syndrome
Runner’s knee
It is diagnosed clinically, based on a combination of symptoms you might recognize:
- Pain during squatting, running, or going downstairs
- Increased pain with prolonged sitting with knees bent
- Relief when straightening the leg
- Partial relief from anti-inflammatory medication and rest, but minimal change with ice or heat
A physical therapist might perform a grind test, where the kneecap is pushed into the joint. This test is highly sensitive but not very specific, meaning many people experience pain during the test even if they don’t have anterior knee pain.
What Causes Anterior Knee Pain?
The exact cause of anterior knee pain is not well understood. Historically, orthopedic specialists blamed lesions on the cartilage behind the kneecap and sometimes surgically repaired them. However, Scott Dye’s pain mapping study found that these cartilage lesions were not consistently painful or able to reproduce symptoms.
Other factors have been explored:
- Gender: Female athletes experience anterior knee pain more often than male athletes. Some have linked this to Q angle (hip width relative to knee width), but research shows this isn’t a universal cause.
- Foot arch support: Providing arch support can reduce anterior knee pain for some, but flat feet alone do not always cause knee pain.
- Hip muscle strength: Weak hip muscles are associated with anterior knee pain, though it’s unclear whether weak hips cause knee pain or result from it.
In short, the exact cause may remain uncertain, but the mechanics of the pain are well understood.
How Physical Therapists Approach Treatment
Anterior knee pain is mechanical and follows predictable load-dependent patterns:
- More load through the front of the knee → more pain
- Less load → less pain
- Low load over a long period → more pain than a brief, intense load
These patterns give physical therapists variables to address the pain. Treatment strategies include:
- Load modification: Adjusting exercise form, running tempo, or using external support
- Alignment practice: Ensuring proper mechanics during movement
- Capacity building: Strengthening supportive muscles and conditioning the joint to handle more load
While there are countless tips online for treating anterior knee pain, an evaluation by a physical therapist can help identify what specifically works for you—getting you back to activity safely and effectively. If you’re ready for a personalized plan, you can book an appointment with us by calling 610-260-0750 or emaiingl [email protected] to schedule an evaluation and start moving forward with confidence.
Innovative Physical Therapy, “Solutions in Motion”
Innovative Physical Therapy is a state-of-the-art physical therapy clinic in Mission Valley, San Diego. With over 30 years of experience, we provide individualized care tailored to your unique needs. Our skilled physical therapists utilize manual therapy techniques and movement analysis to identify the root causes of your issues, enabling us to develop effective treatment plans for immediate symptom relief and long-term health.
Written and Researched By: Andy Wiseman, PT, DPT, OCS