Kline Christopher E, Kubala Andrew G, Kowalsky Robert J, Barone Gibbs Bethany
Department of Health and Human Development, University of Pittsburgh, 32 Oak Hill Court, Pittsburgh, PA 15261 USA.
Leidos, Inc., San Diego, CA USA.
Sleep Biol Rhythms. 2024 Oct 7;23(1):67-74. doi: 10.1007/s41105-024-00552-x. eCollection 2025 Jan.
A bout of leisure-time physical activity improves sleep on the subsequent night. However, whether breaking up sedentary time during the workday improves sleep is unknown. The purpose of this study was to examine whether breaking up prolonged sitting by standing during the workday leads to better sleep the following night. 25 inactive adults (16 males, 42.4 ± 11.8 years, body mass index: 31.9 ± 5.0 kg/m) participated in a randomized crossover trial consisting of two simulated 8-h workdays involving prolonged sitting (SIT) or alternating sitting and standing every 30 min (SIT-STAND). Sleep was assessed on the night following each workday. Participants completed a diary and wore a wrist accelerometer (Actiwatch Spectrum) to assess multiple dimensions of sleep (e.g., timing, duration, wakefulness, quality). Paired -tests and Hedges' effect sizes evaluated differences in sleep across conditions. Self-reported wakefulness after sleep onset (WASO) was significantly lower following SIT-STAND compared to SIT (13.9 ± 30.1 min vs. 23.2 ± 38.6 min; = 0.03, = - 0.51), mirrored by a small-sized nonsignificant reduction in accelerometer-assessed WASO following SIT-STAND compared to SIT (32.7 ± 13.6 min vs. 40.8 ± 25.8 min; = 0.06, = - 0.38). Mean accelerometer-based activity levels during sleep were also lower following SIT-STAND compared to SIT (10.8 ± 14.5 vs. 14.7 ± 10.4 counts/min; = 0.03, = - 0.47). Other sleep outcomes (e.g., bed- and wake-time, total sleep time, sleep onset latency) were not different between conditions. Alternating sitting and standing rather than prolonged sitting during a simulated workday modestly reduces night-time wakefulness. Whether similar benefits occur with long-term reduction in workplace sedentary behavior deserves further exploration.
一段时间的休闲体育活动可改善随后一晚的睡眠。然而，在工作日打破久坐状态是否能改善睡眠尚不清楚。本研究的目的是检验在工作日通过站立来打破长时间久坐是否会使次日夜间睡眠质量更好。25名缺乏运动的成年人（16名男性，42.4±11.8岁，体重指数：31.9±5.0kg/m）参与了一项随机交叉试验，该试验包括两个模拟的8小时工作日，一个是长时间坐着（SIT），另一个是每30分钟交替坐立（SIT-STAND）。在每个工作日后的夜晚评估睡眠情况。参与者完成一份日记，并佩戴腕部加速度计（Actiwatch Spectrum）以评估睡眠的多个维度（如时间、时长、清醒程度、质量）。配对t检验和赫奇斯效应量评估不同条件下睡眠的差异。与SIT相比，SIT-STAND后自我报告的睡眠起始后清醒时间（WASO）显著更低（13.9±30.1分钟 vs. 23.2±38.6分钟；P=0.03，效应量=-0.51），与之对应的是，与SIT相比，SIT-STAND后加速度计评估的WASO虽有小幅下降但不显著（32.7±13.6分钟 vs. 40.8±25.8分钟；P=0.06，效应量=-0.38）。与SIT相比，SIT-STAND后睡眠期间基于加速度计的平均活动水平也更低（10.8±14.5 vs. 14.7±10.4计数/分钟；P=0.03，效应量=-0.47）。其他睡眠指标（如上床时间和起床时间、总睡眠时间、入睡潜伏期）在不同条件之间没有差异。在模拟工作日中交替坐立而非长时间坐着可适度减少夜间清醒时间。长期减少工作场所的久坐行为是否会带来类似益处值得进一步探索。
