Regular Sleep Routine Best
Ana Krieger, MD, MPH, director of the Center for Sleep Medicine at Weill Cornell Medicine in New York City, commented on the study for this news organization. “This is a very interesting study, as it adds to the literature,” she said. “Previous research studies have shown metabolic abnormalities with variations in sleep time and duration.”
“This particular study evaluated a large sample of patients in the UK which were mostly White middle-aged and may not be representative of the general population,” she noted. “A similar study in a Hispanic/Latino group failed to demonstrate any significant association between sleep timing variability and incidence of diabetes. It would be desirable to see if prospective studies are able to demonstrate a reduction in diabetes risk by implementing a more regular sleep routine.”
The importance of the body’s natural circadian rhythm in regulating and anchoring many physiological processes was highlighted by the 2017 Nobel Prize of Medicine, which was awarded to three researchers in circadian biology, she pointed out.
“Alterations in the circadian rhythm are known to affect mood regulation, gastrointestinal function, and alertness, among other factors,” she said. “Keeping a regular sleep routine will help to improve our circadian rhythm and better regulate many processes, including our metabolism and appetite-controlling hormones.”
Notably, a study published online in Diabetologia in a racially and economically diverse US population also found that adults with persistent suboptimal sleep durations (< 7 or > 9 hours nightly over a mean of 5 years) were more likely to develop incident diabetes. The strongest association was found among participants reporting extreme changes and higher variability in their sleep durations.
This study was supported by the National Institutes of Health (grant number R01HL155395) and the UKB project 85501. Dr. Kianersi was supported by the American Heart Association Postdoctoral Fellowship. Dr. Kianersi and Dr. Krieger reported no conflicts of interest.
A version of this article first appeared on Medscape.com.