祖国医学认为,“阴阳四时者,万物之终始也,死生之本也”。对人体与时间的协同适应作了概括的论述。近代的生物钟学说认为,机体的生理活动是通过神经、内分泌和细胞的定时系统协同作用,增强机体适应外界环境的能力,从而使机体在时间上与四季、昼夜的周期性变化相适应。《素问》指出:“从阴阳则生,逆之则死”,为 The motherland medicine believes that “the four seasons of yin and yang, the beginning of all things, the life and death of the original”. A general description of the coordinated adaptation of human body and time is given. Modern biological clock theory believes that the physical activity of the body is based on the synergistic action of neural, endocrine and cell timing systems to enhance the body’s ability to adapt to the external environment, so that the body adapts to the cyclical changes of the four seasons and day and night. “Su Wen” pointed out: “From yin and yang, students will die when they are opposite.”