Running in Fort Collins should feel rewarding. Miles of trails, foothills, parks. So when knee pain starts showing up on every run, it’s frustrating — and it’s the most common reason runners walk into our clinic.
Here’s the part that surprises most runners: knee pain is rarely a knee problem. It’s almost always a hip problem.
Why your knees pay the price for hip weakness
Your knee is a hinge. It does what the joints above and below it allow it to do. When the hip is weak or restricted, the knee has to absorb force it wasn’t designed for. Same with the foot and ankle below.
Common patterns we see:
- Weak glute medius lets the knee collapse inward on each stride
- Tight hips reduce stride efficiency, putting the knee through more cycles per mile
- Underdeveloped calf and foot strength sends impact straight up the chain to the knee
The knee pain is the symptom. The hip is the problem.
The most common runner’s knee diagnoses
Patellofemoral pain (runner’s knee). Aching pain around or behind the kneecap, especially on hills and stairs.
IT band syndrome. Sharp, lateral knee pain that comes on around mile two or three.
Patellar tendonitis. Aching just below the kneecap, often after speed work or hills.
Pes anserine bursitis. Pain on the inside of the knee, just below the joint line.
All four respond to the same root work: address the hip, train the foot, fix the loading pattern.
What works (and what doesn’t)
Rest alone rarely fixes it. Pain quiets down, you go back to running, pain comes back. The pattern that caused it is still there.
Stretching the IT band doesn’t loosen the IT band. It’s connective tissue, not a muscle. The fix is upstream: hip strength and tissue work for the muscles that attach to it.
What works: progressive hip and core strength, foot and ankle conditioning, gait coaching, and a return-to-run plan that loads progressively. Most runners are back to full mileage in 6 to 8 weeks.
When to come in
If knee pain has lasted more than two weeks, is changing your stride, or comes back every time you build mileage, get it looked at. The fix is straightforward when caught early. It’s a longer road when chronic.
Frequently Asked Questions
Why do my knees hurt when I run?
Knee pain is rarely a knee problem — it is usually a hip problem. The knee is a hinge that does what the joints above and below allow. A weak glute medius lets the knee collapse inward each stride, and the knee absorbs force it was never designed for.
What are the most common running knee diagnoses?
Patellofemoral pain (runner's knee), IT band syndrome, patellar tendonitis, and pes anserine bursitis. All four respond to the same root work: address the hip, train the foot, fix the loading pattern.
Do I have to stop running?
In most cases no. Running volume and pattern get adjusted while the hip and foot strength catch up.
