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水是人体的六大营养素之一。人体内的所有细胞和血液中都有水,儿童少年体内水约占体重的80％。在进行体育锻炼时,常常大量出汗,尤其在炎热的夏天,使人觉得口干舌燥,很想喝水。但这时一定注意饮水量要适当。大量饮水,一时间并不能把水全部吸收到血液中去,过多的水分便聚积在胃肠道内,胃沉重闷胀,使人感到不舒服,容易引起慢性胃
Water is one of the six major nutrients in the body. All cells and blood in the body have water, children and adolescents body water accounts for about 80% of body weight. When doing physical exercise, often sweating a lot, especially in the hot summer, people feel dry mouth and want to drink plenty of water. But this time must pay attention to drinking water should be appropriate. A large number of drinking water, for a time and can not be absorbed into the blood to the whole, too much water will accumulate in the gastrointestinal tract, heavy stomach boring, people uncomfortable, likely to cause chronic stomach