Researchers at the Sleep Laboratory of the University of Rochester (New York, USA) recently demonstrated that on sunny days we sleep better – that is, longer and deeper – than on rainy days . In fact, his experiments for 105 consecutive days, compared with meteorological data from the National Oceanic and Atmospheric Administration (NOAA), revealed that when "pointers" fall, we wake up more lethargic , we use less energy throughout the day and that prevents adequate rest the next night.
These facts could have to do with levels of serotonin, the wellness hormone, which are regulated by sunlight. When the day is gray, the levels of this hormone in our body drop drastically and we lose vitality and feel excess drowsiness.
