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实验分为饮淡水组（Ｆ）和０．１％盐水组（Ｓ），每组７人，热暴露前半小时饮水５００ｍｌ，热暴露时少量多次饮水１０００ｍｌ，在ＷＢＧＴ３５．６℃热室内负重步行２小时。结果表明，热暴露时饮水量占体排水量的６０％左右。Ｓ组出汗量比Ｆ组高１４％，尿量少２１％，尿蛋白转阳性率较低，血红蛋白增高和血容量减少较小。平均汗Ｋ＋浓度为６．８０、Ｎａ＋８６．９、Ｃｌ－８４．７、Ｃａ２＋１．６１、Ｐ０．９３、Ｍｇ２＋０．４２ｍｍｏｌ／Ｌ。由于汗中无机盐的损失，引起血清部分电解质浓度和空腹尿中无机盐排出量降低。补充０．１％盐水对改善Ｎａ＋、Ｃｌ－平衡乃至Ｋ＋、Ｃａ２＋、Ｍｇ２＋、Ｐ平衡和血液酸碱、血气都有裨益。热环境下无机盐供给量以每人每日Ｋ＋７０～８０、Ｎａｃｌ３７０～３８０、Ｃａ２＋２２３～２５、Ｍｇ２＋２５、Ｐ５７ｍｍｏｌ为宜。
The experiment was divided into drinking freshwater group (F) and 0.1% saline group (S), with 7 in each group. 500ml of water before half an hour of thermal exposure and 1000ml of repeated drinking water during thermal exposure were carried on weight-bearing walk in WBGT of 35.6 ℃ 2 hours. The results show that drinking water accounts for about 60% of body water when exposed to heat. Sweating volume in group S was 14% higher than that in group F, urine output was 21% less, urinary protein positive rate was lower, hemoglobin increased and blood volume decreased less. The average K + concentration was 6.80, Na + 86.9, Cl-84.7, Ca2 + 1.61, P0.93, Mg2 + 0.42 mmol / L. Due to the loss of inorganic salts in the sweat, the serum partial electrolyte concentration and the reduced urinary salt excretion in the fasting urine are caused. 0.1% saline to improve the Na +, Cl-balance and even K +, Ca2 +, Mg2 +, P balance and blood acid-base, blood gas has benefits. In the hot environment, the amount of inorganic salt supplied per person per day K + 70 ~ 80, Nacl370 ~ 380, Ca2 +223 ~ 25, Mg2 +25, P57mmol appropriate.