The most damaging phrase in musculoskeletal care
"Bone on bone." "Wear and tear." "Your knee is worn out." These phrases — heard in consultation rooms every day — do measurable harm. They create a mental picture of a joint being sanded away by movement, so patients logically conclude: move less, protect the knee.
The evidence says the opposite. Cartilage is living tissue that adapts to load. Joints that move — within a sensible dose — maintain cartilage health better than joints that rest. Fransen et al.'s Cochrane review (2015) is unambiguous: exercise reduces pain and improves function in knee osteoarthritis, with an effect size comparable to analgesics — without the side effects.
What osteoarthritis actually is
Osteoarthritis (OA) is not passive erosion. It is an active process of the whole joint — cartilage, bone, capsule, muscle — in which the balance between tissue breakdown and repair has tipped towards breakdown. Pain in OA correlates surprisingly poorly with X-ray findings: some people with "severe" imaging have little pain; others with mild changes have a lot.
Why does that matter? Because it means the X-ray is not your destiny. Pain and function can improve substantially even though the image stays the same.
Why rest makes it worse
- Cartilage nutrition depends on movement — cartilage has no blood supply; it gets nutrients through compression and decompression cycles, like a sponge
- Muscles weaken fast — and the quadriceps is the knee's shock absorber. Weaker quads = more load on the joint itself
- Weight and metabolic health decline — inactivity compounds the systemic inflammation that drives OA progression
- Fear grows — the less you do, the more fragile you feel, the less you do
Our integrated approach to knee OA
1. Settle the flare
An inflamed OA knee resists exercise. MLS laser therapy has meta-analysis-level evidence for reducing pain in knee OA (Stausholm et al., 2019), and we use it to open the window in which loading becomes tolerable.
2. Build the shock absorbers
Progressive strengthening of the quadriceps, hamstrings and hip — starting at whatever level the knee tolerates today, even isometrics on a bad day. Dosed correctly, exercise is the treatment.
3. Fix the load distribution
Biomechanical assessment and foot posture correction change how force passes through the knee on every step. Small alignment changes multiplied by thousands of daily steps are not small.
4. Manage the system
Sleep, body composition and systemic inflammation all influence OA pain. This is where our HRV and lifestyle monitoring adds a layer most programmes ignore.
What about surgery?
Joint replacement is a genuinely good operation — for the right knee at the right time. But guidelines are clear that structured exercise, education and weight management should come first, and evidence shows patients who rehabilitate before surgery (prehabilitation) recover better after it (Wallis and Taylor, 2011). Whether your knee ever needs surgery or not, the strongest version of it wins.
Told your knee is "worn out"? Get a second opinion based on function, not just imaging. Book an assessment at Bruno Physical Rehabilitation, Ipswich.
References
- Fransen, M., McConnell, S., Harmer, A.R. et al. (2015) 'Exercise for osteoarthritis of the knee', Cochrane Database of Systematic Reviews, 1, CD004376.
- Bannuru, R.R., Osani, M.C., Vaysbrot, E.E. et al. (2019) 'OARSI guidelines for the non-surgical management of knee, hip, and polyarticular osteoarthritis', Osteoarthritis and Cartilage, 27(11), pp. 1578–1589.
- Wallis, J.A. and Taylor, N.F. (2011) 'Pre-operative interventions (non-surgical and non-pharmacological) for patients with hip or knee osteoarthritis awaiting joint replacement surgery: a systematic review and meta-analysis', Osteoarthritis and Cartilage, 19(12), pp. 1381–1395.
- Stausholm, M.B., Naterstad, I.F., Joensen, J. et al. (2019) 'Efficacy of low-level laser therapy on pain and disability in knee osteoarthritis: systematic review and meta-analysis of randomised placebo-controlled trials', BMJ Open, 9(10), e031142.
- Hunter, D.J. and Bierma-Zeinstra, S. (2019) 'Osteoarthritis', The Lancet, 393(10182), pp. 1745–1759.