A Complete Collection of 100000 Whys
Fav十万个为什么
为什么游泳时尿多？
游泳时尿多主要是由于水温刺激、水平位浸泡及运动刺激导致体内液体循环和激素水平变化，从而增加尿液产生。
1、入水后，低温水刺激皮肤，通过神经反射促使肾脏排尿增多，以维持体温平衡。
2、身体浸泡在水中呈水平位，血液更易流向心脏，导致中心血容量增加，刺激心房释放利尿钠肽，促进尿液生成。
3、游泳作为一项运动，会加速血液循环和新陈代谢，使身体产生更多代谢废物，进而增加尿液的产生。
4、水温通常低于体温，为维持体温，外周血管收缩，血液流向内脏，肾脏血流量增加，尿量随之增多。
5、游泳时，抗利尿激素分泌减少，进一步导致尿液稀释和尿量增加。
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