Overview

Knee complaints become more common with age, and many older adults are told — or assume — that they should protect their knees by resting and avoiding activity. The evidence points the other way: regular, appropriately dosed exercise is one of the most effective things for knee pain, stiffness and function, and weaker muscles tend to make knees feel worse over time.

This guide covers how to keep knees strong and comfortable in later life, including what to make of arthritis on scans.

Who This Is For

Adults 60 and older who want to keep knees healthy
People with early or established knee osteoarthritis who want to stay active
Anyone who has been avoiding activity because of knee pain and wants a safe starting point

Common Risk Factors

Muscle weakness, especially in the quadriceps and hips
Higher body weight, which increases load through the knee
Previous knee injury — ligament, meniscus or fracture
Long periods of inactivity
Expecting that "wear and tear" on scans means activity is dangerous (it usually does not)

What Imaging Changes Really Mean

Scan changes are common in pain-free knees. MRI shows osteoarthritis features in a large share of people over 40 who have no knee pain at all. Seeing changes on a scan is not the same as knowing how a knee feels, and most knees can be loaded and strengthened safely regardless of what imaging shows.

Daily Habits That Help

Walk, cycle, swim or garden regularly — the knee responds to use
Do sit-to-stands, wall sits and step-ups a few times a week to keep the thighs and hips strong
Start each session easily and build up; mild discomfort that settles is often acceptable, while sharp pain or lasting flare-ups mean the dose is too high
Use a chair height, step size or distance that works for you, and progress gradually
Manage body weight if you are overweight, because it directly affects knee loading

What to Avoid

Complete rest — it weakens the muscles that support the knee
Training through sharp pain or repeatedly causing swelling that lasts more than a day or two
Jumping straight back to heavy loading after a flare-up without rebuilding gradually

Warning Signs

Arrange an assessment if pain is persistent, worsening or limiting daily life. Seek prompt care for a hot, red, swollen knee with fever, sudden severe swelling, a locked knee, inability to bear weight, or rapid worsening over days or weeks.

References

National Institute for Health and Care Excellence. "Osteoarthritis in over 16s: diagnosis and management." NICE guideline NG226. 2022. https://www.nice.org.uk/guidance/ng226
Bannuru RR, et al. "OARSI guidelines for the non-surgical management of knee, hip, and polyarticular osteoarthritis." Osteoarthritis and Cartilage. 2019;27(11):1578-1589. https://pubmed.ncbi.nlm.nih.gov/31278997/
Culvenor AG, et al. "Prevalence of knee osteoarthritis features on magnetic resonance imaging in asymptomatic uninjured adults: a systematic review and meta-analysis." British Journal of Sports Medicine. 2019;53(20):1268-1278. https://pubmed.ncbi.nlm.nih.gov/29886437/

This information is for education only and is not a medical diagnosis. InjuryAtlas does not replace an assessment by a qualified health professional. If you have severe pain, visible deformity, numbness, loss of function, or symptoms that are getting worse, seek medical care promptly.

Knee Health for Older Adults