What the cohort research says about running and knees

Both studies use data from the Osteoarthritis Initiative. The 2017 analysis compared adults who had never run with those who had run in the past or still ran; about 30% had run at some point. Before adjustment, the odds of symptomatic knee osteoarthritis were 0.64 for current runners and 0.81 for past runners, against 1.0 for never-runners. Adjusted results for symptoms were similar.

The 2018 study followed 1,203 adults over 50 who already had knee osteoarthritis, 138 of them runners. Over four years, running was not linked to more pain or faster X-ray progression.

Three limits matter: both studies are observational, running was self-reported and recreational, and only 138 people in the second study ran. They show no link to harm, not proof that running helps knees.

Sore knees after running: what the evidence supports

Pain around the kneecap, called patellofemoral pain and often runner's knee, drives many searches for running knee supplements. A 2018 panel of 41 researchers and clinicians reviewed the trials and supported exercise therapy, especially hip-focused and knee-focused exercises together. They called the evidence unclear for taping, bracing, dry needling and gait retraining.

We found no trial of a supplement for kneecap pain, so we make no claim for one.

Mileage: what the 10% rule has behind it

The 10% rule says to raise weekly distance by no more than about 10%. The evidence is thinner than the rule. A one-year study of 874 novice runners, 202 of them injured, found no statistically significant difference in injury rates between progression groups. Runners who added more than 30% over two weeks had a higher rate of distance-related injuries, including patellofemoral pain (hazard ratio 1.59), but that result was not statistically significant.

Where a supplement fits

None of these studies tested a supplement in runners. The one large trial we cite gave glucosamine, chondroitin sulfate or both to 1,583 people with painful knee osteoarthritis. Overall, none beat placebo for pain. In an exploratory subgroup with moderate-to-severe pain, the pair did. That is not a runner result. Joint Axis Pro, our formula, contains glucosamine, MSM, hyaluronic acid, curcumin with piperine and boswellia. If you are weighing whether a joint supplement suits you at all, start with our guide on who should take one.

Questions we hear from runners

What the research actually says

Frequently Asked Questions

References

• Lo GH, Driban JB, Kriska AM, et al. "Is there an association between a history of running and symptomatic knee osteoarthritis? A cross-sectional study from the Osteoarthritis Initiative." Arthritis Care Res. 2017;69(2):183-191. PubMed | DOI
• Lo GH, Musa SM, Driban JB, et al. "Running does not increase symptoms or structural progression in people with knee osteoarthritis: data from the Osteoarthritis Initiative." Clin Rheumatol. 2018;37(9):2497-2504. PubMed | DOI
• Collins NJ, Barton CJ, van Middelkoop M, et al. "2018 Consensus statement on exercise therapy and physical interventions (orthoses, taping and manual therapy) to treat patellofemoral pain." Br J Sports Med. 2018;52(18):1170-1178. DOI
• Nielsen RO, Parner ET, Nohr EA, Sorensen H, Lind M, Rasmussen S. "Excessive progression in weekly running distance and risk of running-related injuries: an association which varies according to type of injury." J Orthop Sports Phys Ther. 2014. Record
• Clegg DO, Reda DJ, Harris CL, et al. "Glucosamine, chondroitin sulfate, and the two in combination for painful knee osteoarthritis." N Engl J Med. 2006;354(8):795-808. PubMed | DOI
• Shaw G, Lee-Barthel A, Ross ML, Wang B, Baar K. "Vitamin C-enriched gelatin supplementation before intermittent activity augments collagen synthesis." Am J Clin Nutr. 2017;105(1):136-143. PubMed | DOI