我们应该继续改变时钟吗? 描述夏令时对行为和生理学的因果关系
medRxiv : the preprint server for health sciences
|January 29, 2026
概括
日光节约时间 (DST) 转移活动时间,而不是总步骤. 个体模式因人口统计和活动类型而异,表明结构约束影响适应时间变化.
科学领域:
- 时间生物学 时间生物学
- 公共卫生 公共卫生
- 可穿戴技术可穿戴技术
背景情况:
- 日光节约时间 (DST) 被辩论,政策决策受到行为效益与健康风险的感知影响.
- 现有的关于DST影响的研究经常使用聚合数据和严格的模型,限制因果推理和个人层面的见解.
研究的目的:
- 调查DST转换对日常身体活动和生理测量的因果影响.
- 用客观的,纵向的可穿戴数据分析个人级别的活动模式,超越聚合数据的限制.
主要方法:
- 利用自然差异设计,将亚利桑那州 (非DST) 与邻近的DST观察州进行比较.
- 采用来自NIH我们所有人研究计划的客观,纵向的Fitbit数据,避免严格的建模假设.
- 分析了一天中不同时间的活动重新分配,并根据活动表型和人口统计学探索了活动变化.
主要成果:
- 黄昏时间的转换并没有改变每天的总步数,而是重新分配了活动,在秋季增加了早上的步数,减少了晚上的步数,在春季产生了相反的影响.
- 活动重新分配模式在不同的活动表型 (早晨,中性,晚上步行者) 和人口群体 (年龄,收入,性别) 中有显著差异.
- 休息心率显示微小,临床上无意义的日内转移与行为变化相关.
结论:
- 冬季时间影响身体活动的时间,而不是总量,在适应方面具有显著的个体变化.
- 工作时间表和安全感知等结构因素可能会影响个人适应DST诱导的时间转移的能力.
- 这项研究证明了连续可穿戴数据和因果推理方法的实用性,以告知有关DST的健康相关政策.
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