The head of the bed faces west, and people sleep in the opposite direction to the rotation of the earth, which affects sleep. Xiao Naiyuan, a professor of astronomy at Nanjing University, said that the earth's rotation is indeed from west to east, but whether this rotation affects people's sleep has not been studied by experts in the field of astronomy, and it is not very clear.
2, the magnetic field said: it should be north-south direction.
The earth is a huge magnetic field, and its magnetic field lines come out from the North Pole and cross the surface of the earth into the South Pole. The direction of sleep conforms to the magnetic field lines, and under the action of magnetic field forces, qi and blood run smoothly. Zhang Xi, director of the Science Department of Purple Mountain Observatory, Chinese Academy of Sciences, said, first of all, the magnetic field does have north and south, but it does not completely coincide with the north and south poles of our earth, but has a significant angle with them. As for whether the magnetic field "helps" sleep, there is no research in astronomy.
3. The ancients said it should be east-west.
Sun Simiao said in "A Thousand Daughters Should Be Prescribed": "Ordinary people lie, facing east in spring and summer, and facing west in autumn and winter." Sleep in autumn and winter with your head facing west and your feet facing east as far as possible, which conforms to the law of "nourishing yin in autumn and winter". Some scholars in ancient health books in China advocated not to sleep in one direction for 365 days. Because spring and summer belong to the sun, the head should sleep in the east; Autumn and winter are cloudy, and your head should sleep to the west. However, no matter how you tune it, it's all things, but the feet and head are upside down.