Faculty of Liberal Arts, Meiji Pharmaceutical University, Tokyo 204-8588, Japan.
MTI Ltd., Tokyo 163-1435, Japan.
Int J Environ Res Public Health. 2021 Mar 21;18(6):3245. doi: 10.3390/ijerph18063245.
The aim of the present study was to investigate the association among lunar cycle, menstrual cycle onset, and subjective sleep quality. Menstrual cycle onset data from the six most recent menstrual cycles were obtained for 529 women (aged 25-39 years) using the smartphone app Luna Luna. We also collected questionnaire survey data on sleep quality from each participant. Overall, there was no association between the onset of menstrual cycle and lunar phase. Interestingly, the proportion of good sleepers with menstrual cycle beginning during the light period was significantly higher than that during the dark period, while the proportion of poor sleepers with menstrual cycle beginning during the dark period was significantly higher than that during the light period. When participants were categorized by the combination of lunar phases (light, dark, neutral periods) in the two most recent menstrual cycle onsets, the "both dark period" group and the "other (light and dark) period" group showed the lowest proportion of good sleepers. Menstrual cycle onset in the dark period was associated with a deterioration in subsequent subjective sleep quality, which was more apparent with consecutive onsets in the dark period or at a rapidly changing lunar phase.
本研究旨在探讨月球周期、月经周期起始与主观睡眠质量之间的关联。使用智能手机应用程序 Luna Luna，我们获取了 529 名年龄在 25-39 岁之间的女性最近六个月经周期的月经周期起始数据。我们还从每位参与者那里收集了关于睡眠质量的问卷调查数据。总体而言，月经周期起始与月相之间没有关联。有趣的是，在光期开始月经周期的女性中，睡眠质量良好的比例显著高于在暗期开始月经周期的女性，而在暗期开始月经周期的女性中，睡眠质量较差的比例显著高于在光期开始月经周期的女性。当根据最近两次月经周期起始时的月相（光期、暗期、中性期）对参与者进行分类时，“均为暗期”组和“其他（光期和暗期）”组中睡眠质量良好的比例最低。月经周期起始于暗期与随后主观睡眠质量恶化相关，而在暗期连续起始或月球相位快速变化时更为明显。
