Is Right-side Sleeping the Best Position?
Many people wake up feeling dizzy, lightheaded, back pain, and exhausted—mainly due to improper sleeping posture.
Supine (lying flat) is the most common position. Traditional Chinese medicine calls this "corpse lying," which fixes the body and limbs in straight positions, failing to achieve full-body rest. When intra-abdominal pressure increases, supine sleeping may cause chest tightness or suffocation. People often unconsciously place hands across the chest, compressing the heart and lungs, increasing nightmares.
Prone (face-down) sleeping places most of the body’s weight on ribs and abdomen, compressing the chest and diaphragm, impairing breathing and increasing heart load. Prone position also increases lumbar curvature, putting pressure on small joints at the spine’s rear. Turning the neck sideways to tilt the head makes neck muscles prone to injury.
Left-side sleeping allows slightly bent legs, aiding relaxation and fatigue relief. However, since the heart lies between the two lungs and leans left, and the stomach connects to the duodenum and small intestine to the colon—all on the left—left-side sleeping compresses both heart and gastrointestinal tract, slowing gastric emptying.
Traditional Chinese medicine holds that the correct sleeping posture is slight right-side lying with knees bent. This keeps the heart elevated, free from compression; the liver is lower, receiving better blood supply, aiding metabolism. Food in the stomach moves downward by gravity toward the duodenum, promoting digestion and absorption. Meanwhile, the whole body relaxes, breathing becomes smooth, heartbeat slows, and brain, heart, lungs, intestines, muscles, and bones receive full rest and adequate oxygen.
Of course, healthy individuals need not overly fixate on sleeping posture, as people rarely maintain one fixed position all night. Most constantly shift positions, which actually helps relieve fatigue.