The results demonstrate that whereas there may be an average cycle duration of about 90 min individual cycles are very variable. The contents of a cycle influence its duration, and the onset of the REM period is not a strictly time-locked phenomenon....
There was a small but significant change in population sleep patterns over the course of the menstrual cycle. Sleep duration was at its lowest in the pre-menses phase (nadir at Day -2), then climbed steadily during the menses and follicular phase (peak at Day 3), before dipping again ...
Sleep loss is one of large challenges during space missions. A variety of sleep problems have been shown in space. We aimed to further characterize more representative and consecutive sleep-wake patterns and to investigate sleep-wake cycle on heart rate during short duration spaceflight mission. ...
We included a total of 8,457 individuals. In the adjusted model, participants with lower income, educational status, and food security had significantly higher prevalence of insufficient sleep duration on both workdays and non-workdays. For example, low-income individuals (poverty-income ratio <...
Learn how to change time of snooze on iPhone. This simple guide will show you step-by-step instructions for adjusting your snooze duration, ensuring you wake up when you want to.
Early evidence suggests that lockdown policies worldwide have led to changes in sleep timing, duration, and quality; however, few studies have attempted to look at the longer-term effects across multiple countries in a large data set. This study uses self-reported data from 64,858 users of ...
The last decade has witnessed a growing body of epidemiological and basic research on sleep and cognitive health. However, the association between sleep
This pooled cohort study investigates the association between sleep duration and cognitive decline in a combined analysis of 2 nationally representative
Sleep duration, psychiatric disorders and dementias are closely interconnected in older adults. However, the underlying genetic mechanisms and brain structural changes are unknown. Using data from the UK Biobank for participants primarily of European anc
In the 2015-2016 cycle, sleep duration was created from a question: “How much sleep do you usually get at night on weekdays or workdays?” Sleep duration was categorized as < 7 hours, 7 to 9 hours, and ≥ 9 hours. 2.2.3. Covariate assessment The selection of covariates is based on...