Aerobic Exercise Tops Other Workouts for Knee OA
Get the Health newsletter
Daily health & science — research, biotech, public health, the studies worth knowing. Free.
- BMJ systematic review of 217 randomized trials spanning 1990–2024 and 15,684 participants found aerobic exercise — including walking, cycling, and swimming — ranked most effective for knee osteoarthritis pain, physical function, walking ability, and quality of life.
- Aerobic exercise showed moderate-certainty evidence of pain reduction at 4-week and 12-week follow-ups, with physical function gains sustained through the 24-week long-term timeframe.
- Mind-body and neuromotor training offered narrower benefits — mind-body likely improved short-term function, neuromotor boosted short-term gait performance — but researchers said they should supplement, not replace, aerobic activity.
- Strengthening and mixed exercise programs showed mid-term function improvements, but ranked below aerobic exercise across every outcome measured in the network meta-analysis.
- No exercise type was linked to higher adverse event risk versus control groups, supporting exercise as a safe treatment option across the board.
- Researchers recommend aerobic exercise "as a first line intervention for knee osteoarthritis management," while noting structured alternatives remain useful when aerobic activity isn't suitable for individual patients.
- Study limitations flagged by the authors include indirect comparisons across trials, missing long-term data for some outcomes, and possible influence of smaller studies on early results.
Why it matters: For the nearly 30% of adults over 45 showing knee osteoarthritis signs on x-rays — half of them with severe symptoms — this BMJ review gives clinicians the clearest evidence to date for prescribing walking, cycling, or swimming as the first exercise option. The uniform safety finding across all exercise types also lets patients skip the 'will it hurt my knees?' hesitation.
Ask SkimNews
