Lying in the sun, also called supine posture, is a traditional health exercise and belongs to Qigong. Mainly through the specific posture and breathing methods to regulate the human body's qi and blood and viscera functions, in order to achieve the effect of strengthening the body and prolonging life. It is ok to lie in the sun after waking up in the morning, which will have some benefits. After a night's sleep, the muscles and joints of the human body will be a little stiff. Lying in the sun helps to relax the body, promote blood circulation and relieve fatigue.