骨關節炎患者每天應至少走6千步

骨關節炎(osteoarthritis，OA)最好的治療手段是運動。但太少太多都不好。到底多少合適呢?

發表在本期(6月刊)Arthritis Care & Research的一項新研究給出了具體的量：

每天至少要走6千步( ≥ 6000 steps/day )。6千步為下限，少於6千則效果不顯著。每走1千步，以後殘疾風險降低16-18%。步行大約1千步/10分鍾，所以每天走1小時最佳。

來源: http://onlinelibrary.wiley.com/doi/10.1002/acr.22362/abstract

Results: Among 1788 participants (mean age 67, mean BMI 31 kg/m², female 60%), each additional 1000 steps/day was associated with a 16% and 18% reduction in incident functional limitation by performance-based and self-report measures, respectively. Walking < 6000 and < 5900 steps/day were the best thresholds to distinguish incident functional limitation by performance-based (67.3%/71.8% [sensitivity/specificity]) and self-report (58.7%/68.9%) measures, respectively.

Conclusions: More walking was associated with less risk of functional limitation over two years. Walking ≥ 6000 steps/day provides a preliminary estimate of the level of walking activity to protect against developing functional limitation in people with or at risk of knee OA.