The influence of continuous versus interval walking exercise on knee joint loading and pain in patients with knee osteoarthritis.

The study included only 27 participants and measured acute changes during the testing sessions, so it cannot show long-term effects on pain or osteoarthritis progression. The participants had to be able to walk continuously for 45 minutes at 1.3 m/s, so the findings may not apply to people with knee OA who cannot tolerate that amount of walking. Pain ratings were on average at the lower end of the 0 to 10 scale, so the study may not reflect people with more severe knee pain. The two testing days were not randomised, although a post-hoc check found no significant day differences. Knee load was estimated from a model that did not include ligaments, so it may not fully represent real joint loading. Treadmill walking may not match overground walking, and participants could not change their gait as freely in response to pain.

The authors reported no conflicts of interest. The study sponsors had no role in the study design, data collection, analysis, or writing.

Do not read this as proof that interval walking reduces joint load or treats knee OA. It was a small laboratory study of treadmill walking, and it measured acute knee load and pain ratings, not long-term function or disease progression.