正常的劳动和体育锻炼可伸展筋骨、通畅气血、增强体质、预防疾病。若过度劳累或过度安逸(如久视、久立、久行、久卧、久坐),均会损伤人体相应脏腑气血甚或五官九窍等,即中医所谓“五伤”。久视伤血古人认为人体五脏的精华都上注于目。但与目关系最密切的是血目得血的滋养才能视物、辨物。五脏中与目直接相关的就是 Normal labor and physical exercise can stretch the bones, smooth blood, enhance physical fitness, prevent disease. If over exertion or over-ease (such as long-term, long standing, long trip, long-lying, sedentary), will damage the body corresponding organs blood or even nine organs, that is, the so-called Chinese medicine “five injuries.” As long as the wounds of the ancients that the essence of the five internal organs are on the eyes. But the most closely related with the head is blood nourishing to visual material, identify objects. Of the five internal organs is directly related with the head