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What Does the Research Say?
Patellofemoral Pain and Adjacent Joint Injuries
Patellofemoral pain doesn't stay at the knee. Nearly half of all patients develop a second injury within two years. Here's what drives that risk and what stops it.
46.6%
of individuals diagnosed with patellofemoral pain sought care for an adjacent joint injury within two years. That's nearly half of all patients developing a second problem at the spine, hip, or ankle.
Where the Next Injury Shows Up
Lumbar Spine
21.2%
The most common adjacent site. One in five patients with patellofemoral pain later sought care for a lumbar spine problem.
Ankle and Foot
11.0%
Altered gait patterns and compensatory loading may drive downstream injuries at the ankle and foot complex.
Hip
3.1%
Hip injuries were less common but still significant, reflecting the kinetic chain link between patellofemoral mechanics and proximal function.
Exercise Protection
0.78
Hazard ratio for lumbar injury when patients received therapeutic exercise. Exercise reduced risk at the spine, hip, and ankle-foot.
🛡️
Therapeutic Exercise Is Protective Beyond the Knee
Patients who received therapeutic exercise for their patellofemoral pain had reduced risk of subsequent lumbar, hip, and ankle-foot injuries. The hazard ratios were 0.78 for lumbar, 0.93 for hip, and 0.86 for ankle-foot injuries. Treating the knee doesn't just fix knee pain. It protects the entire kinetic chain.
3 Takeaways for Your Practice
1
Rehab Planning
Treat the Chain, Not Just the Joint
Patellofemoral pain may be a sentinel event signaling broader kinetic chain dysfunction. Comprehensive rehabilitation addressing hip, knee, and trunk strengthening reduces risk not only at the knee but at adjacent joints as well.
2
Patient Education
Exercise Is a Preventive Investment
Patients need to understand that completing a full exercise program is not just about their current pain. Therapeutic exercise has a documented protective effect against future injuries at the spine, hip, and ankle. Adherence matters beyond symptom relief.
3
Screening Priority
Monitor Adjacent Joints at Follow-Up
Given the 46.6% rate of adjacent joint injury, follow-up visits should include screening questions about new symptoms at the lumbar spine, hip, and ankle. Early identification allows prompt intervention before compensatory patterns become entrenched.
This content is for informational purposes for licensed clinicians and does not constitute medical advice or a substitute for your own clinical research and judgment. Content may include AI-synthesized information; all clinical data, protocols, and dosages must be verified against official primary sources prior to patient care. Any reference to CE rules or regulations is provided as a guide and must be independently verified against current governing body requirements prior to completing credits. This article may contain links to external websites or third-party AI platforms. Ridley Learning has no control over the nature, content, and availability of those sites and does not necessarily endorse the views expressed within them. Ridley Learning is not liable for any injury, loss, clinical outcomes, or licensure issues resulting from the use of or reliance on this information. Your use of this site constitutes acceptance of these terms.
Meet the Author: Anne Osborn, PT, MPT
Anne Perry Osborn is a distinguished physical therapist and entrepreneur with over two decades of experience bridging clinical practice and healthcare education. She holds a Master of Physical Therapy from Texas Tech University Health Sciences Center and currently serves as the Owner and Director of Quality and Accreditation at Ridley Learning. With a background that includes clinical roles in outpatient rehabilitation and home health, Anne brings practical, hands-on insight to her leadership in continuing education, ensuring that learning opportunities remain relevant and impactful for today's practitioners.
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