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一忌不选择场地在天然水域游泳时,要注意了解水域的深浅和水底情况;另外,被工业废水、农药或病原微生物污染的水域不宜游泳。二忌不做准备活动水温比气温低,在入水前应做准备活动,充分活动四肢及躯干,并用水擦脸及身体,使之适应水温。否则容易出现头晕、心慌、恶心、腹痛等不适,甚至引起“抽筋”或拉伤肌肉。初学者若进
Avoid not choose the venue to swim in natural waters, we should pay attention to understand the depth and depth of waters; In addition, industrial wastewater, pesticides or pathogenic microorganisms contaminated waters should not swim. Second, do not prepare to do activities, the water temperature is lower than the temperature, should be prepared before entering the water activities, full activities limbs and torso, and wipe the face and body with water to adapt to the water temperature. Otherwise prone to dizziness, palpitation, nausea, abdominal pain and other discomfort, and even cause “cramp ” or strain the muscles. If beginners into