Runner’s Knee (PFPS): The Complete Guide to Return to Running
If you have been a runner for any length of time, you have most likely dealt with knee pain to some extent. And there is a good chance it was Runner's knee or patellofemoral pain syndrome (PFPS). It is that dull, achy pain behind the knee cap or around the front of the knee. It can be hard to pinpoint an exact location and sometimes feels like it moves around. You may have been told that is due to your kneecap not “tracking” right in its groove or that your quads and hips are weak but things are actually a little more complex than that.
Before getting into how to treat PFPS, it is important to have a better understanding of the condition itself. It is the most common running related injury by nearly double the next of ITB pain. It is documented to occur in approximately 17% of all knee pain cases, and nearly 30% of all runners with females being 2.2x more likely to have it occur. Symptoms typically occur with activities involving weight bearing with knee bending or prolonged knee bends such as running, stairs, deep squats, and prolonged sitting. And although very common, runner’s knee is a difficult condition to manage. It can be very stubborn to go away with over 50% of people reporting symptoms lasting 18+ months and another 50% of people having a recurrent episode within one year. So take heart and know, if you have been struggling with runner’s knee you are not alone!
Moving beyond just the poor kneecap tracking and weakness of the quads/hips, runner's knee is a multifactorial problem that can be boiled down to two major factors: load vs recovery. Load refers to the actual stress put on the knee joint which is impacted by the strength of your muscles, training mileage, intensity, running form all which influence the 4x body weight compression that happens though the joint. Recovery refers to how your body manages this stress such as sleep quality and length, stress and fear related to your knee pain, and systemic inflammation from things like secondary medical conditions.
As you can see, runner’s knee no longer has a lot more going on than was initially thought. So how do we actually treat it? Well this is best approached through a 3 fold process.
Understanding Pain with Runner’s Knee: Gaining understanding of runner’s knee is the foundation for addressing the root problem. That clicking, popping, and grinding sensation happening in your knee is not a sign of “wear and tear” or further damage to your knee. It is most likely due to the good lubricating fluid moving through the knee joint that is releasing little air bubbles. Not always comfortable, but not harmful. Further, just because something hurts, it does not mean there is harm. Think of your knee as sensitive. Just like a bruise, if you bump it there is going to be pain but that does not mean you are causing more damage to the bruise.
Strength Training: Building up your quad, hip abductors, and glutes strength is the next step to get back onto the road to running. Depending on your sensitivity levels, you may want to start with hip specific exercises that minimal load the knee like: sidelying hip abduction with a physioball, side steps or captain morgans. Then consider progressing to more knee specific loading like lateral step downs, splits squats, and single leg box squats. There are a wide range of exercises you can perform to help but this is where a medical professional, such as a PT, can give you the best individualized ones to address your condition.
Gait Retraining: Running gait should be viewed as a signature, we all have one but it is unique to each of us. Similar in the sense that running form is highly variable and individualized. However, when in pain with runner's knee there are a few tips that can help off load the knee and potentially get you back to running sooner. Simple things like increasing cadence (or steps per minute) by 5-10%, and adjusting foot strike to land more on your forefoot are both effective ways to decrease load on the knee.
The final part of the journey to dealing with runner’s knee is the return to running part. This is highly variable depending on your sensitivity levels and running history, however a good rule of thumb is to start with a walk jog progression. Something simple such as 5 rounds of 1 minute of jogging with 3 min of walking is a way to introduce load into the knee joint while giving it plenty of time to recover. From here, you can slowly increase jogging time while reducing walking time until you are continuously running again.
Keep in mind that symptoms with all activities should stay less than a 3/10 during and afterwards return to baseline within 24 hours. If this does not happen then hold off on progressing to your next intervals or up intensity. Be aware of red flag signs such as, increased pain at rest, significant swelling, or inability to weight bear as these should warrant an evaluation by a medical professional.
Runner’s knee is the most common running injury yet is one of the most complex conditions to deal with and treat. However, you can get back to running. Though it may take some time, your goals should be to manage your knee load during daily activities, progressive build leg strength, and prioritize recovery with sleep, nutrition, and stress management. If you have been struggling with progress, do not hesitate to reach out. I am here to help provide you with an individualized plan to get you back on track.
Disclaimer: This information is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or health-related goals.
References
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Gragnani, B. C., Hart, H. F., Forsyth, A., Barton, C. J., & De Oliveira Silva, D. (2026). Patellofemoral pain is a multifactorial complex condition; are we missing a multidisciplinary approach to its management? Time for a paradigm shift. Open Access Journal of Sports Medicine, 16, 517971. https://doi.org/10.2147/OAJSM.S517971
Neal, B. S., Lack, S. D., Bartholomew, C., & Morrissey, D. (2024). Best practice guide for patellofemoral pain based on synthesis of a systematic review, the patient voice and expert clinical reasoning. British Journal of Sports Medicine, 58(24), 1486–1495. https://doi.org/10.1136/bjsports-2024-108110
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Rathleff, M. S., Graven-Nielsen, T., Hölmich, P., et al. (2019). Activity modification and load management of adolescents with patellofemoral pain: a prospective intervention study including 151 adolescents. The American Journal of Sports Medicine, 47(7), 1629–1637. https://doi.org/10.1177/0363546519843915
Teng, H.-L., & Powers, C. M. (2014). Sagittal plane trunk posture influences patellofemoral joint stress during running. Journal of Orthopaedic & Sports Physical Therapy, 44(10), 785–792. https://doi.org/10.2519/jospt.2014.5249
