不少人在游泳时,喜欢潜入水底游上一会儿,有些青少年还喜欢与同伴比赛看谁潜水的时间长。要知道,这是危险的。潜泳时间长了,容易产生头痛、头晕和胸部憋闷的症状,其主要原因是大脑暂时性缺氧所致。潜泳时,一般人都喜欢先作多次连续的深呼吸,再屏气入水潜泳。潜泳中,开始是闭气一段时间,然后才慢慢呼气,当肺内气体全部呼出后,呼吸就处于停顿状态,这些动作对人体的呼吸系统和 When swimming, many people like to swim in the water for a while, and some teens also like to watch the diving competition with their peers for a long time. You know, this is dangerous. Lifelong swimming time is long, prone to headache, dizziness and chest oppressed symptoms, the main reason is due to temporary cerebral hypoxia. When swimming, most people like to take multiple deep breaths in succession, and then hold their breath into the water for snorkeling. Lifelong, the beginning is the breath for a period of time, and then slowly exhaled, when all the breath of gas within the lungs, the breathing is at a standstill, these actions on the human respiratory system and