人体血液里要含有一定浓度的盐,才能维持正常的生理过程。出汗时,体内的一部分盐随汗水排出体外,人就感到口渴。如果这时喝大量的白开水,水进入体内会冲淡血液中盐的含量,使盐分相对地减少。为了维持体内原有的正常盐分的浓度,不得不把多量的水分排出体外。因此,在大量出汗后,再喝大量的白开水,便会出汗更多。越出汗,盐分和水分损失得越多,也就越会觉得口渴。血液中盐分含量过低,便会发生肌肉抽搐等现象。那么幼儿在体育锻炼中觉得口渴怎么办?其实口渴并不一定是身体缺水,有时 Human blood must contain a certain concentration of salt, in order to maintain normal physiological processes. Sweating, part of the body of salt excreted with sweat, people feel thirsty. If this time to drink plenty of boiled water, water into the body will dilute the salt content in the blood, so that the relative reduction of salt. In order to maintain the body’s normal concentration of normal salt, had to put a large amount of water excreted. Therefore, after a lot of sweating, drink plenty of boiled water, it will sweat more. The more you sweat, the more salt and water you lose, the more you feel thirsty. Salt content in the blood is too low, there will be muscle twitching and so on. So young children feel thirsty in physical exercise how to do? In fact, thirst is not necessarily the body of water, and sometimes