Does Running Ruin Your Knees?

If you’re a runner and someone tells you “running will wear out

your knees,” here’s what the evidence actually shows.

A JOSPT patient summary based on a large systematic review (17 studies; 114,829 people) found recreational running is not associated with higher rates of hip or knee osteoarthritis—and runners actually showed lower OA prevalence than non-runners.

OA prevalence in the included studies:

• Recreational runners: 3.5%

• Sedentary/non-runners: 10.2%

• Competitive runners: 13.3%

  
  

Bottom line: moderate, recreational running doesn’t “ruin” your joints. If anything, being sedentary is the bigger red flag.

The threshold concept: volume matters

A key clinical nuance from the summary is that the “running causes OA” signal shows up most consistently in very high-volume contexts. One commonly cited cutoff in the paper is >57 miles (92 km) per week—a training load that’s simply not representative of most recreational runners.

So the more accurate framing is: running isn’t the problem—unlimited, high-volume running without adequate capacity is.

Clinical implications (what I do with this in practice)

1) Stop fear-based advice

“Don’t run because of arthritis” is usually the wrong default. Recreational running isn’t the culprit—poor load management and low tissue capacity are.

2) Treat running like dosage, not danger

For symptomatic runners, the goal isn’t “no running.” It’s the right amount of running:

• keep most runs easy

• progress gradually

• use predictable weekly structure

  
  

3) Build joint capacity on purpose

If you want knees/hips that tolerate impact, you need strength + exposure. The big rocks:

• quads (knee load tolerance)

• glutes (pelvis + femur control)

• calves (impact buffering + propulsion)

  
  

4) Use a simple symptom rule to guide progression

A practical clinical rule that works:

• symptoms during the run stay ≤3/10

• no progressive worsening mid-run

• back to baseline by the next day

If you can hold that, you can usually keep running while rehab progresses.

Takeaway

Recreational running isn’t a joint death sentence. The evidence supports a better message:

Keep people running. Dose it well. Build capacity. Progress with symptoms—not fear.