Behavioural responses to COVID19 lockdown will define the long-term impact of psychological stressors on sleep and brain health. Here we tease apart factors that help protect against sleep disturbance. We capitalise on the unique restrictions during COVID19 to understand how time of day of daylight exposure and outside exercise interact with chronotype and sleep quality. 3474 people from the UK (median age 62, range 18 to 91) completed our online 'SleepQuest' Study between 29th April and 13th May 2020 − a set of validated questionnaires probing sleep quality, depression, anxiety and attitudes to sleep alongside bespoke questions on the effect of COVID19 lockdown on sleep, time spent outside and exercising and self-help sleep measures. Significantly more people (n=1252) reported worsened than improved sleep (n=562) during lockdown (p<0.0001). Factors significantly associated with worsened sleep included low mood (p<0.001), anxiety (p<0.001) and suspected, proven or at risk of COVID19 symptoms (all p<0.03). Sleep improvement was related to the increased length of time spent outside (P<0.01). Older people's sleep quality was less affected than younger people by COVID19 lockdown (p<0.001). Better sleep quality was associated with going outside and exercising earlier, rather than later, in the day. However, the benefit of being outside early is driven by improved sleep in 'owl' (p=0.0002) and not 'lark' (p=0.27) chronotype, whereas, the benefit of early exercise (inside or outside) did not depend on chronotype. Defining the interaction between chronotype, mental health and behaviour will be critical for targeted lifestyle adaptations to protect brain health through current and future crises.

中文翻译：

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COVID锁定期间的睡眠质量，心理健康和昼夜节律：SleepQuest研究的结果

对COVID19锁定的行为反应将定义心理压力因素对睡眠和大脑健康的长期影响。在这里，我们梳理有助于防止睡眠障碍的因素。我们利用COVID19期间的独特限制来了解白天的时间和户外运动如何与表型和睡眠质量相互作用。来自英国的3474人（年龄在62岁，年龄在18至91岁之间）在2020年4月29日至2020年5月13日期间完成了我们的在线“ SleepQuest”研究-一组有效的调查问卷，探讨睡眠质量，抑郁，焦虑和睡眠态度以及关于以下问题的定制问题COVID19锁定对睡眠，在户外度过的时间和锻炼以及自助睡眠措施的影响。锁定期间，有更多的人（n = 1252）出现了比睡眠改善（n = 562）恶化的情况（p <0）。0001）。与睡眠质量恶化显着相关的因素包括情绪低落（p <0.001），焦虑（p <0.001）以及可疑，确诊或有COVID19症状的风险（所有p <0.03）。睡眠改善与在户外度过的时间增加有关（P <0.01）。与COVID19锁定相比，老年人的睡眠质量受年轻人的影响较小（p <0.001）。更好的睡眠质量与白天出门而不是晚运动有关。然而，早起的好处是由“猫头鹰”（p = 0.0002）而不是“幼虫”（p = 0.27）表型的睡眠改善所驱动，而早运动（内部或外部）的益处并不取决于表型。定义表型之间的相互作用，