A study conducted by the University of Washington (United States) and the University of Quilmes (Argentina) confirms that the moon, especially its cycles, have effects on sleep. Popular beliefs are therefore not that crazy.
The moon disrupts sleep
According to an old popular belief, we sleep less well on full moon nights. A phenomenon which is confirmed by scientific research. According to a study published on January 27, 2021 in the journal Science Advance, the star of the night would disturb sleep. This is said to be the result of a survey of 98 people living in northern Argentina and 464 students in the Seattle area, United States.
To carry out their study, scientists from the University of Washington (United States) and the University of Quilmes (Argentina) measured the sleep oscillations linked to the moon cycle. They found that they were the same on each of the two groups of participants, regardless of their access to electricity. According to the researchers, ” All of them showed the same oscillations of sleep as the moon progressed through its cycle. Total amount of sleep varying throughout the lunar cycle from 46 to 58 minutes on average, with bedtime varying from around 30 minutes ” we read in Top Health.
We sleep less well the nights before the full moon
Concretely, this means that the nights before the full moon (between 3 and 5), sleep is disturbed with a later fall asleep and shorter phases. In addition, although everyone has altered sleep before the full moon, the study shows that the variations are less pronounced in participants living in cities, and for good reason, there is more light at night.
It would all be a matter of the light emitted by the moon. When it is in an increasing phase, it shines more at the beginning of the night and when it is in a decreasing phase, the moon emits a light which occurs especially in the middle of the night, which has less impact on sleep.