每日步数的灵活目标:零星和反复的步骤与全因死亡率之间的关联
1Department of Electrical and Electronic Engineering, The Hong Kong Polytechnic University, Hong Kong, P.R. China.
Journal of physical activity & health
|July 4, 2025
概括
无论是零星步骤还是发作步骤都会降低死亡风险. 与零星步骤相比,累积的步骤,定义为至少10分钟的步行,提供了较大的死亡率降低.
科学领域:
- 公共卫生 公共卫生
- 流行病学 流行病学
- 生物统计学 生物统计学
背景情况:
- 身体活动,包括每天的步数,对公共健康至关重要.
- 了解不同步骤模式对死亡率的影响差异对于有针对性的卫生干预措施至关重要.
研究的目的:
- 调查零星步骤和发作步骤与全因死亡率之间的关联.
- 为了确定是否在发作 (≥10分钟) 中累积步骤比零星步骤提供了不同的死亡率益处.
主要方法:
- 一项队列研究分析了来自美国国家健康和营养检查调查 (2005-2006) 的3072名参与者.
- 腰部佩戴的加速度计记录了7天内每天的步数.
- 一个随机的森林分类器分辨了零星的步骤和突发的步骤;考克斯模型评估了死亡率的关联,控制了混因素.
主要成果:
- 在13.1年的时间里,发生了632起死亡事件.
- 零星步骤每增加1000步,死亡率降低10% (95% CI,7%-13%).
- 每增加1000步的发作步骤都与27%的死亡率降低相关 (95% CI,17%-35%).
- 达到6000或10500步的个体与低步度参考组相比,显示出显著的死亡率降低.
结论:
- 无论是零星的还是发作的步骤都与全因死亡率相反相关.
- 越来越多的步骤会导致死亡风险的大幅度降低.
- 每天的步骤目标可以通过各种各样的零星和有节奏的步骤组合来实现,从而促进健康益处.
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