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冬日参加早晨体育锻炼,由于天气过于寒冷,加上机体尚未消除一夜睡眠所出现的低体温、低基础代谢状态。如果锻炼前准备活动不充分,那么,清晨的寒冷空气就会对鼻腔、气管和毗邻的咽、食道起暂时的降温作用,使机体出现“冷适层”。倘若锻炼结束后不稍事休息,马上较快地吞食刚烧好的稀饭、馄饨、馒头、水饺、汤圆等过烫食物,有些人就往往容易发坐吐血、便血等症状。从运动生理学上分析,这是由于处于“冷适层”状态下的食管粘膜层及其附近组织内的毛细血管和稍大一些的血管,不能一下
Winter exercise in the morning to participate in the morning, due to the weather is too cold, coupled with the body has not yet eliminated the night’s sleep hypothermia, low basal metabolic state. If exercise preparation is not sufficient, then the early morning cold air will nasal cavity, trachea and the adjacent pharynx, esophagus temporary cooling effect, the body appear “cold layer ”. If the exercise does not take a break after the end of the exercise, immediately swallowed fresh porridge, wonton, steamed bread, dumplings, dumplings and other over-hot foods, some people tend to prone to take vomiting blood, blood in the stool and other symptoms. Physiologically, this is due to the presence of capillaries and slightly larger blood vessels in the esophageal mucosa and its vicinity in the “cold-adapted” state