The Association of Recreational and Competitive Running With Hip and Knee Osteoarthritis: A Systematic Review and Meta-analysis.

Runners and clinicians have long wondered whether all that pounding on joints raises the risk of hip or knee osteoarthritis, or whether a sedentary lifestyle might be just as much a concern. This review pooled data from 25 studies, including over 125,000 people, comparing rates of osteoarthritis among competitive runners, recreational runners, and non-running controls. The broad pattern was that recreational runners had a notably lower occurrence of osteoarthritis than either sedentary controls or competitive runners, while competitive runners showed a higher occurrence than controls. Running for under 15 years was also linked to lower odds of osteoarthritis than being sedentary.

These patterns are interesting because they challenge the simple idea that running is uniformly harmful or protective for joints, suggesting instead that both inactivity and very high training volumes may carry risk. The key limitation is that this is observational evidence, so the authors could not establish whether running caused these differences or whether other factors, like previous injury, explained them.

If you run for fitness and have wondered whether it's hard on your hips or knees, this review offers some context. Researchers combined results from 25 studies covering more than 125,000 people to compare rates of hip and knee osteoarthritis, a joint condition involving pain and stiffness, among recreational runners, competitive or elite runners, and people who didn't run at all. Recreational runners had the lowest rates of osteoarthritis in these studies, lower than both sedentary non-runners and competitive runners.

Competitive runners, on the other hand, had somewhat higher rates than non-runners. Running for fewer than 15 years was also linked to lower rates than not running. It's important to understand that this type of study can only show patterns, not prove that running itself causes or prevents joint problems.

Things like past injuries or other lifestyle factors could also explain the differences, so these findings shouldn't be read as a definitive verdict on running and joint health.

This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.

When patients ask whether running is likely to damage their hips or knees over time, this meta-analysis offers some relevant population-level context, though it cannot answer the question causally. Pooling data from 17 studies meta-analyzed out of 25 identified (114,829 of 125,810 total individuals), the review found hip and/or knee osteoarthritis prevalence of 13.3% in competitive runners, 3.5% in recreational runners, and 10.2% in sedentary controls. The odds ratio for osteoarthritis was higher in competitive runners than controls (1.34) and lower in recreational runners than controls (0.86), with a statistically significant difference between the two runner subgroups.

A subgroup analysis also linked under 15 years of running exposure to lower odds versus controls (0.6, 95% CI 0.49 to 0.73). These findings inform discussions about distinguishing recreational from high-volume or long-duration competitive running when considering joint health, but subgroup results by duration and sex should be treated as less certain, resting on study subsets rather than the full pooled sample. Critically, this is observational evidence drawn from studies of varying design, and the authors explicitly state they could not determine whether associations were causal or confounded by factors such as prior injury.

It does not establish that running causes or prevents osteoarthritis, nor does it provide guidance on safe training thresholds for individual patients.