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为什么久坐久站脚会发麻?

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为什么久坐久站脚会发麻?

一个人连续坐上几个小时,双脚会发胀。与久坐相比,长时间站立不动就更不行了,不消一两个小时,两只脚就发胀,时间再长些,足背还会zhong起来。原来,人ti内的水分han量极高,这些水分在ti内不断liu动,保证了血ye循环及各zhong新陈代谢过程的正常进行。如果由于某zhong原因使ti内yeti发生回liu障碍,这就会滞留在组织间隙中,这时,人ti如果进行适量的活动,通过肌rou的收缩放松,可以使yeti恢复到平衡状态。如果长时间坐着或站着,由于地心引力的作用,血ye会淤积在下肢静脉中,使静脉内压力增加,mao细血guan内压力也随之升高,促使血浆中的水分加速向组织间隙转移。下肢组织间隙中的yeti滞留过多,结果是先使人gan觉脚发胀、发麻,然后chu现脚zhong。

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