Why is the knee the most commonly affected joint in osteoarthritis?

The knee bears substantial load through all weight-bearing activities, making it highly vulnerable to the cumulative effects of age, excess body weight, prior injury, and repetitive loading. The medial (inner) compartment is most often affected. Risk factors include obesity, previous meniscal or ligament injury, prolonged kneeling or squatting, and knee alignment issues.

What exercise is best for knee osteoarthritis?

Quadriceps strengthening is among the most evidence-supported interventions — strong quadriceps reduce compressive forces on the joint. Low-impact aerobic exercise (cycling, swimming, aquatic therapy) maintains cardiovascular health and muscle function without excessive joint load. Tai chi and yoga show consistent evidence for reducing pain and improving balance and function.

Can massage help knee osteoarthritis?

Massage therapy applied to the surrounding musculature can reduce pain, improve range of motion, and improve overall wellbeing in knee OA. It does not reverse structural changes but provides meaningful symptomatic benefit as part of a broader management strategy, particularly where muscle tension and guarding contribute to pain.

When is knee replacement surgery considered?

Knee replacement is typically considered when pain and functional limitation are severe and have not responded adequately to conservative management. It is a highly effective procedure for end-stage osteoarthritis. Complementary approaches can play an important role in both preparing for surgery (prehabilitation) and supporting recovery afterwards.

Musculoskeletallow Risk

Osteoarthritis of knee

Degenerative joint disease specifically affecting the knee cartilage.

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Reviewed by Dr. Ian Henderson · Microbiobial Health & Medicine26 March 2026Research-supported

Quick answer

Knee osteoarthritis involves the gradual breakdown of knee joint cartilage, causing pain, stiffness, and reduced function. Strong evidence supports therapeutic exercise, weight management, acupuncture, and anti-inflammatory nutrition for pain reduction and function improvement.

Do any of these feel familiar?

Osteoarthritis of the knee typically presents as pain, stiffness, and a reduced range of movement in the affected knee
Many people describe a deep, aching discomfort that is worse after activity and eases somewhat with rest — though prolonged inactivity can itself cause stiffness
Getting up from a chair, walking downstairs, or rising from a low surface are often the most challenging movements
A grating, clicking, or creaking sensation within the knee is frequently reported
Swelling can develop after more active periods
Over time, many people adjust their daily activities and walking patterns to manage pain, which can contribute to deconditioning and changes in other joints

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Overview

Symptoms & Affected Systems

Contributing Factors

Supporting Lifestyle Strategies

Evidence Context

When to Seek Professional Help

Related Conditions

Osteoarthritis

Musculoskeletal Pain

Patellofemoral Pain Syndrome

Gout

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