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117 Days ago

New York: Women who have more regular sleep schedules, including regular bedtimes across weekdays and weekends, have improved metabolic health, says a new study.

Disrupting biological timing and high bedtime variability may harm glucose metabolism and energy homeostasis -- the balance between food intake and energy expenditure, the findings revealed.

"Irregular sleep schedules, including highly variable bedtimes and staying up much later than usual, are associated in midlife women with insulin resistance, which is an important indicator of metabolic health, including diabetes risk," said senior author Martica Hall, professor of psychiatry at the University of Pittsburgh in Pennsylvania, US.

In addition to sleeping seven or more hours per night on a regular basis, adults should strive to maintain a consistent schedule by going to bed and waking up at the same times on weekdays and weekends, the researchers stressed.

The research team analyzed data from the SWAN Sleep Study, an ancillary project to the Study of Women's Health Across the Nation (SWAN).

The community-based sample comprised 370 Caucasian, African American and Chinese non-shift working women between the ages of 48 and 58 years.

Results show that greater variability in bedtime and greater bedtime delay were associated with higher insulin resistance, and greater bedtime advance was associated with higher body mass index (BMI), the findings, published in the journal Sleep, revealed.

In prospective analyses, greater bedtime delay - for example, staying up 2 hours later than usual - also predicted an increase in insulin resistance 5 years later. (IANS)

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