A small study links weighted-blanket use at bedtime to increased melatonin production.
Using a weighted blanket at bedtime may boost the body's production of the sleep-promoting hormone melatonin, a small study suggests.
"This is a very interesting study, but it would be nice to see it replicated in a second cohort because it is not an obvious thing that melatonin should increase with a weighted blanket," Håkan Olausson , a neuroscientist at Linköping University in Sweden, told The Washington Post . In addition to light, environmental factors — such as the timing of meals, physical activity and social interactions — can sway somewhat when melatonin gets made, according to a 2005 review in the Journal of Biological Rhythms .
During a session, each participant would eat dinner, sit in bright light for two hours and then sit in dim light until lights out at 11 p.m. One hour before lights out, they would snuggle up under either the lightweight blanket or the weighted blanket. In that hour, the researchers took saliva samples every 20 minutes to monitor each subject's melatonin levels. of what's present in a person's bloodstream.
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