骨关节炎患者每天应至少走6千步

骨关节炎(osteoarthritis，OA)最好的治疗手段是运动。但太少太多都不好。到底多少合适呢?

发表在本期(6月刊)Arthritis Care & Research的一项新研究给出了具体的量：

每天至少要走6千步( ≥ 6000 steps/day )。6千步为下限，少于6千则效果不显著。每走1千步，以后残疾风险降低16-18%。步行大约1千步/10分钟，所以每天走1小时最佳。

来源: 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.