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Falling asleep earlier was linked to greater weight loss in adults with prediabetes, according to new research.An analysis of data from a randomized trial led by the NYU Rory Meyers College of Nursing found that each hour earlier participants fell asleep was associated with roughly 1. 3 pounds of weight loss over eight weeks, although the finding does not prove that moving bedtime earlier causes weight loss.”When we fall asleep — not just how much we sleep — seems to be an important and overlooked factor for weight loss and metabolic health,” Susan Kohl Malone, an assistant professor at the nursing college and the study’s lead author, said in a press release.POPULAR WEIGHT-LOSS DRUGS MAY PREVENT PREDIABETES FROM TURNING INTO DIABETESThe investigation, published in the journal Nursing Research, evaluated 196 adults diagnosed with prediabetes who routinely logged fewer than 6.5 hours of sleep nightly. Half the group took part in an eight-week lifestyle education course on diet, exercise and stress. Going to bed earlier was linked to weight loss in adults with prediabetes, independent of the total number of hours they spent asleep. (iStock)The other half received the same training alongside behavioral coaching meant to get them to go to bed earlier in gradual phases.DIETITIAN REVEALS SIMPLE EATING STRATEGY FOR BETTER SLEEP — AND ONE HABIT TO AVOIDResearchers tracked participants’ blood sugar, sleep and activity using sensors, sleep logs and wrist-worn monitors.Neither group showed significant improvements in blood sugar. Both groups lost weight, but those receiving sleep coaching did not lose significantly more than those receiving lifestyle education alone. Participants who received sleep coaching did report better sleep quality and less daytime drowsiness, and they gradually began going to bed earlier. (iStock)”While we expected that extending sleep would improve glucose levels and weight loss in adults with prediabetes who sleep for shorter periods, this wasn’t the case in our study,” Malone said.Participants who received sleep coaching did report better sleep quality and less daytime drowsiness, and they gradually began going to bed earlier.CLICK HERE TO SIGN UP FOR OUR HEALTH NEWSLETTERIn a separate analysis across both groups, participants who shifted their sleep earlier tended to lose more weight.The researchers suggested the body’s internal clock may help explain the findings. Staying up late can increase exposure to artificial light, which may activate the body’s stress response and affect hormones that regulate hunger. A statistical projection from the study found that every 60 minutes earlier a participant fell asleep was associated with roughly 1.3 pounds of weight loss across eight weeks. (iStock)Remaining awake late also coincides with the hours when human insulin sensitivity is at its lowest.”In contrast, falling asleep earlier may limit late-night eating and better align food intake with the body’s optimal metabolic window,” Malone noted.CLICK HERE FOR MORE HEALTH STORIESThe trial ran for only eight weeks, which means it’s unclear whether participants could maintain earlier bedtimes or sustain weight loss over the long term.TEST YOURSELF WITH OUR LATEST LIFESTYLE QUIZWhile participants wore wrist monitors, key sleep metrics like rest quality and daytime drowsiness relied heavily on self-reported logs. Researchers noted that staying awake late elevates hunger hormones like ghrelin and increases the likelihood of late-night eating when the body’s insulin sensitivity is at its lowest. (iStock)The findings also show an association across the study group rather than proven cause and effect.Participants receiving sleep coaching fell asleep about 12 minutes earlier on average, according to Malone, which produced no measurable improvement in blood sugar levels.CLICK HERE TO DOWNLOAD THE FOX NEWS APPThe study received funding from the National Institute of Nursing Research, a division of the National Institutes of Health, and was conducted in collaboration with researchers from the University of Delaware. Khloe Quill is a lifestyle writer with Fox News Digital. She and the lifestyle team cover a range of story topics including food and drink, travel, and health.
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