Does Running Cause Knee Arthritis? If you’ve been told running is “bad for your knees”, it can be hard not...
Read MoreIf you’ve been told running is “bad for your knees”, it can be hard not to worry – especially if you feel stiffness after a run or you’ve seen scary posts online.
Let’s clear it up early: Running does not cause knee arthritis.
When researchers compare recreational runners with sedentary non-runners, recreational running is not associated with a higher prevalence of knee/hip osteoarthritis, and in several analyses, recreational runners have lower rates than sedentary controls
Why the “wear and tear” idea doesn’t hold up
The “wear and tear” story suggests that using your knees more will make them wear out like brake pads. But your joints aren’t inert parts, they’re living systems that respond to how you use them.
That’s why it’s possible for:
someone to run regularly without developing knee osteoarthritis, and
someone who’s mostly sedentary to still develop knee osteoarthritis
Large reviews have found that a more sedentary lifestyle is associated with higher osteoarthritis prevalence compared with recreational running, while very high-volume/long-term competitive running may sit differently again.
What the research actually tells us
A systematic review reported that recreational runners had a lower occurrence of hip and/or knee osteoarthritis compared with both competitive runners and non-running controls, and noted that sedentary lifestyle and long exposure to high-volume/high-intensity running were associated with osteoarthritis.
More recent expert commentary from the Osteoarthritis Research Society International (OARSI) similarly states that recreational running is not bad for healthy joints, and highlights the lower prevalence of osteoarthritis reported in recreational runners compared with sedentary individuals.
Cartilage thrives on movement
Your knee cartilage isn’t like a brake pad. It’s living tissue within a joint environment designed to handle load.
Two helpful concepts from the science:
Cartilage responds to mechanical load (it adapts to its environment, and disuse can be harmful).
Cartilage is nourished via synovial fluid, and research has explored how cyclic loading (“pumping”) can assist nutrient transport.
In plain language: cartilage likes being used, within a sensible range.
So what are the real risk factors for knee arthritis?
Running isn’t one of the main drivers. Many factors can contribute to the onset and progression of osteoarthritis, including:
Previous knee injury (e.g., ACL tear, meniscus injury)
- Higher body weight
Age (particularly 45+)
Being female
Genetics
These aren’t guarantees, just factors that can shift risk.
What about treadmill running?
Same principle. Whether you run outside, on a treadmill, or with a run group, what matters most is finding your personal “sweet spot” – not too much, not too little. That balance looks different for everyone, and it can change over time with sleep, stress, training volume, strength and previous injury history.
If you need structured strengthening to support your knees, we can use our rehab gym facilities as part of your plan.
If you’re noticing knee discomfort when you run
You don’t need to assume you’re “wearing your knees out”. Instead, it’s often more useful to look at things like:
how quickly your training load has changed (sudden spikes matter)
your strength and control around the hip/knee/ankle
your running form and footwear choices (when relevant)
your recovery (sleep, stress, overall load)
That’s where a chat with Claire Newbold from AHF Physiotherapy can help. She can look at your running technique, movement patterns, training load and then building a plan that suits your goals.
Key takeaways
Movement (including running) helps support knee joint health, and cartilage adapts to load.
Recreational running is not associated with higher knee osteoarthritis prevalence than being sedentary in major reviews.
The bigger osteoarthritis risk factors include prior injury, excess weight, age/genetics and some occupational load factors.
General information only: If you have persistent swelling, locking, significant instability, or pain that’s worsening, it’s worth getting assessed.
Details:
Disclaimer: This content is for general information and educational purposes only, and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your physiotherapist, GP, or healthcare provider regarding any medical condition or before starting any exercise program.
Claire Newbold
Claire is a registered physiotherapist at AHF Physiotherapy (Brisbane CBD), and a Pilates instructor with a BSc (Hons) Physiotherapy and Postgraduate Certificate in Musculoskeletal Physiotherapy (PG Cert MSK). With over 15 years’ experience across the UK and Australia (working in Australia since 2014), Claire combines evidence-based physiotherapy, clinical Pilates and clear patient education to help people understand their pain and return to the activities they enjoy, especially with knee pain, persistent injuries, running-related issues and osteoarthritis.
Claire’s additional training includes Advanced Dry Needling, APPI Pilates (Matwork 1 & 2; pre/post-natal), Standing Pilates and Pilates for runners, Level 2 running retraining/rehab, and arthritis-focused training.
Worried about your knees when you run?
If you’re getting knee discomfort during or after running, book an appointment and we’ll look at your technique, training load and what your body is telling you – then give you a clear plan to keep running confidently.
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