Why don't you want to get up on a rainy day

Listening to the sound of rain outside the window, you may find yourself "unable to wake up" and lie in bed more than usual. It turns out that the tiredness of rainy days does have a scientific basis. Dr. Michelle Drup, a sleep medicine specialist at the Cleveland Clinic in the United States, has found that drowsiness on rainy days has multiple causes. 1. Increased secretion of melatonin. Melatonin has a regulatory effect on the body's biological clock. In rainy and cloudy weather, the sun is blocked by dark clouds, and the body's melatonin secretion will be significantly higher than on sunny days, so it is easier to feel tired. 2. Decreased serotonin. On rainy days, there is less serotonin in the human body, and a decrease in serotonin levels can easily lead to depression and weakness. 3. Humidity increases. On rainy days, the air humidity is larger, and the negative ion content in the air will also increase. Negative ions also have a sedative and hypnotic effect. 4. Sound of raindrops. The sound frequency of the rain sound is usually between 0 and 20 kHz, which can be called a natural lullaby.

Source: People's Sports