The sleeping posture should be conducive to falling asleep and sleeping naturally and comfortably. Many medical scientists in ancient and modern times believe that right decubitus is better. This is mainly derived from the human physiological structure. The human heart is located on the left side of the chest cavity, the opening of the gastrointestinal tract is on the right side, and the liver is also located on the right side. If you lie on the right side, you can reduce the pressure on the heart. If the pressure on the heart is lower, it will help the blood to be pumped out, increase the blood flow to the stomach, liver and other organs, which will help the digestion and absorption of food and the body's metabolism.
Moreover, lying on the right side is conducive to the relaxation of the muscles of the whole body, because lying on the right side makes the spine bend forward like a bow, and the limbs can be stretched comfortably.
Although the right position is the best prone position, it also varies from person to person. For example, infants and young children should not sleep in one position for a long time; for patients with some diseases, it is also impossible to force the right side lying position mechanically.