人体各器官,是在神经系统的指挥下协调工作的。吃饭时,大量的血液在神经系统的调节下流向胃肠,供给充足的氧气和养料,以保证对食物及时消化和吸收。而在运动时,骨骼肌的血液供应量则大大增加。如果饭后立即进行体育锻炼,为了保证肌肉系统顺利工作,神经系统就需减少对消化系统的供血量,以使肌肉得到充足的血液供给。这时,消化系统的活动处于相对抑制状态,吃下去的食物不能很好地被消化吸收,常此以往会造成消化不良或 The organs of the human body are coordinated under the command of the nervous system. Meal, a large number of blood flow to the gastrointestinal system under the regulation of the nervous system, providing adequate oxygen and nutrients to ensure timely digestion and absorption of food. In exercise, skeletal muscle blood supply is greatly increased. If the exercise immediately after a meal, in order to ensure the smooth working of the muscular system, the nervous system need to reduce the amount of blood supply to the digestive system in order to get enough muscle blood supply. At this time, the activities of the digestive system in a relatively inhibited state, eat the food can not be digested and absorbed, often in the past will cause indigestion or