On average, participants went to bed 30 minutes later and slept 50 minutes less on the nights before a full moon, said Koathor Horacio de la Iglesia, a professor in the Department of Biology at the University of Washington at Seattle.
The researchers attached each participant with a sleep monitor on their wrist to track the sleep schedule during one to two lunar cycles. A lunar cycle takes 29.5 days to complete.
Eighteen people from three different Toba indigenous communities, also known as the Qom people, attended in Argentina.
Postdoctoral scholar Couthor Leandro Cassiragahi in the Department of Biology at the University of Washington said that the light after sunset shines until the full moon.
“We believe the purpose of this modulation is to take advantage of moonlight nights that may be good for safe outdoor activities such as hunting or fishing, or to engage in social interactions with other groups,” Cassiragi via email Said to.
One community had no access to electricity, one had some access to electricity, and one had full access to electricity. Despite their access to electricity, there was a strong pattern that showed they all went to bed later and slept less in the days leading up to a full moon.
In the urban community, participants also went to bed later and slept less than participants in rural communities. Cassiragi said he was surprised that the urban community was affected, as he only affected people from rural communities with lunar phases.
“The fact that this modulation was also present in communities with full access to electric light suggests that these effects mediate something other than the moonlight itself,” said Cassiragi.
After collecting sleep data from the Toba / Qom communities, the researchers compared their results with the sleep data that was collected from 464 Seattle students for another study and found the same sleep pattern.
Biology of people and Of a community Dr. Vesevolod stated that social studies may also play a role in the sleep cycle found in this study “Seva” Polotsky, director of Sleep Basic Research and a professor at Johns Hopkins Medical School, who was not involved in the study.
People’s sleep is controlled by our circadian rhythms, An internal clock that controls sleep for a period of about 24 hours, but some people Polatsky said there could now be internal clocks.
A prime example of the human body regulating itself over a long period of time is a woman’s menstruation, he said, which is about one month old. Other mammals have seasonal sleep schedules and hibernates for months at a time, Polotsky said.
Social calendars can also affect one’s sleep schedule, he said, such as going to bed later or sleeping longer on weekends.
For those who have trouble sleeping, de la Iglesia recommends avoiding bright lights and screens during the evening hours, and especially being active before the full moon when “most people have sleep onset ( Delayed) and gets a short sleep. “