Knee Pain: What If the Problem Isn't Actually Your Knee?

Knee pain is one of the best examples of why I do not like treating a body part in isolation. The knee sits between the hip and the foot. Every step you take sends force through all three. If the foot changes what the tibia is doing, or the hip changes what the femur is doing, the knee is the joint stuck in the middle trying to manage the difference.

That does not mean the knee itself cannot be injured. Meniscus tears, ligament injuries, arthritis, patellar problems, and tendon injuries are real. It means that once those possibilities are considered, the next question should be: what is controlling the forces going through the knee?

Why Stairs and Squats Expose the Problem

People often notice knee pain going downstairs, doing squats, getting out of a chair, or running. Those activities increase the demand on the quadriceps and patellofemoral joint while requiring the hip and foot to control rotation.

Patellofemoral pain guidelines reflect this broader view. Exercise programs that target both the hip and knee have better support than treating the knee in isolation, and foot orthoses can help some people in the short term when increased pronation is part of the presentation.

The Foot-to-Knee Connection

When the foot accepts weight, pronation is a normal part of shock absorption. But if that pronation is excessive or lasts too long, the tibia can remain internally rotated longer during stance. The knee then has to adapt to what is happening below it.

The tibialis posterior, tibialis anterior, peroneals, calf muscles, and intrinsic foot muscles all participate in controlling that process. This is why I want to watch somebody walk before deciding that their knee problem begins and ends at the kneecap.

I take a closer look at that foot-loading pattern in my article on plantar fasciitis and why stretching alone may not be enough. It follows the same question from the foot’s side of the story.

The Hip-to-Knee Connection

Above the knee, the gluteus medius and gluteus maximus help control the pelvis and femur. If the pelvis drops or the femur collapses inward during a step-down or single-leg squat, the knee can follow that motion.

The TFL may then become more dominant. The adductors may contribute differently. The quadriceps and hamstrings may start sharing load in a way that changes tension across the joint. Sometimes the painful knee is simply receiving forces that were created by poor control above and below it.

For more on the muscles above the knee, I discuss the TFL, glute medius, and pain on the outside of the hip in a separate article.

What About the VMO, Hamstrings, and Popliteus?

The quadriceps have to control knee extension, and the vastus medialis is commonly discussed in kneecap pain. But I do not like turning every anterior knee problem into a single-muscle VMO problem. The entire quadriceps group, hip, foot, and movement pattern matter.

The hamstrings control the back of the knee and influence tibial rotation. The popliteus is a small but important muscle behind the knee that helps control rotation as the knee moves out of its locked position. The gastrocnemius crosses the knee from below. All of these muscles can change the tension and mechanics around the joint.

The Applied Kinesiology View

With Applied Kinesiology, I am looking for the quality of muscle activation around the entire chain. Can the glute medius stabilize the pelvis? Do the quadriceps maintain function through the range that produces pain? How do the hamstrings and popliteus respond? What happens to the tibialis posterior and peroneals after the patient walks?

I am also looking for the opposite pattern: muscles that are excessively tight or tender because they are compensating. The goal is not to find one "weak muscle" and declare it the cause. It is to understand how the pieces are interacting and whether changing one part of the system changes the painful movement.

Watching those movements is part of how I approach chiropractic care. I want to see what the knee is doing in the activities that bother you and how the hip and foot are participating.

When the Knee Itself Needs More Attention

Acute swelling after injury, inability to bear weight, locking, repeated giving way, a major loss of motion, obvious deformity, or a traumatic pop should be evaluated for structural injury. Persistent swelling, warmth, fever, or unexplained severe pain also deserves medical attention.

When structural damage is present, it needs to be addressed. Functional mechanics still matter, but they do not erase an injured ligament, meniscus, fracture, or advanced arthritic change.

The Takeaway

If your knee hurts, look at the knee. But do not stop there. Look at the foot underneath it and the hip above it. Watch what happens when you walk, squat, step down, and balance on one leg.

The location of the pain tells you where the system is complaining. The movement pattern often tells you why.

If your knee keeps bothering you on stairs, during exercise, or in everyday movement, and you have questions about our approach, you can book a free 15-minute consultation. We’ll talk through your concerns and whether an examination at our clinic would be a good next step.

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About the author: Orie Quinn, D.C., is the founder and lead chiropractor at Ozark Holistic Center in Fayetteville, Arkansas.

Sources

Willy RW, et al. Patellofemoral Pain: Clinical Practice Guidelines. Journal of Orthopaedic & Sports Physical Therapy. 2019.

American Academy of Family Physicians. Patellofemoral Pain: Guidelines from the American Physical Therapy Association. American Family Physician. 2020.

Walther DS. Applied Kinesiology Synopsis. 2nd ed. Systems DC; 2000. See Knee, Foot Pronation, and lower-extremity muscle testing sections.

Read the AAOS patient guide to patellofemoral pain and the muscles that help control the knee.