A long-term study found that adults with irregular sleep timing and fewer than eight hours of rest per night faced about twice the risk of major cardiac events compared to those with regular bedtimes.

A study funded in part by the National Heart, Lung, and Blood Institute found that older adults with irregular sleep patterns — no consistent bedtime or wake time, or wildly different sleep durations ...

Inside every muscle cell, there’s a clock. Not the kind that ticks on your wall or buzzes on your wrist, but a natural timekeeping system that helps your body stay in rhythm. This clock controls when ...

Previous research has analyzed variations in sleep patterns including number of hours slept, quality of sleep, and sleep-wake times, and found an association with cognitive impairments, health and ...

An irregular bedtime in midlife may signal an increased risk of cardiovascular disease. A new study from the University of Oulu suggests that large swings in when people go to bed could double the ...

A new study to be presented at the SLEEP 2026 annual meeting found that irregular sleep - including variability in sleep timing and duration - was associated with lower receptive vocabulary and ...

Researchers at the Yong Loo Lin School of Medicine, National University of Singapore (NUS Medicine), have found that insufficient weekday sleep significantly disrupts glucose metabolism even when ...

While you may assume that your wake-up time is the most important factor in your overall health, a new study of more than 3,000 participants suggests that your bedtime may be even more important. The ...

Intraindividual sleep variability refers to the night-to-night fluctuations in sleep timing, duration and continuity within the same person. Unlike average sleep duration, variability captures ...