沖凍水涼有益還是有害？ 心臟科醫生提醒： 心血管病患者應該注意健康風險

但讀者應該注意，以上研究多針對健康人群，研究規模小、統計功效不足、亦多缺乏隨機對照試驗（Randomised controller trial), 因此從科學角度看，只能視為假定性結論，目前沒有足夠嚴謹的醫學實證支持洗冷水澡有益於心血管健康。

沖凍水涼｜注意事項：並非人人都適合沖凍水涼 1類人士應注意健康風險！

美國國家冷水安全中心（National Center for Cold Water Safety）曾撰文提醒，若突然全身浸入10至15.5°C的冷水，或可致1分鐘內有生命危險¹⁰。

亦有研究曾發現冬季游泳比賽參加者的心臟肌鈣蛋白（Troponin）水平較高，反映長時間浸泡在冷水中有機會可能導致心肌受損¹¹。

患有已知或隱性的心血管疾病人士亦可能因全身急速暴露於冷水中，出現心律失常或急性心肌缺血^12,13，可對健康構成重大風險 。

沖凍水涼｜水溫下調不應過急

因此，陳醫生不建議患有心血管疾病或高血壓未受控制的人士，全身急速浸泡於冷水之中。若要洗冷水澡，亦應注意水溫下調不應過急，時間亦不宜太長，若洗冷水澡時身體出現不適，應逐漸調升水溫，若洗澡後持續不調（如胸痛、胸悶、心跳、氣喘、頭暈或暈厥），便應盡快求醫診治。

沖凍水涼｜注意事項：要留意身體狀況

那麼，洗冷水澡水溫多少度才適合？陳醫生指出：「沒有醫學證據顯示健康人士或心臟病患者有最佳理想沖涼水溫度。 反而應視乎你的身體健康狀況、水溫下調的速度、接觸冷水的時間等因素，長期遊冬泳或洗冷水澡人士，相比沒有如此習慣人士，身體亦比較容易適應低水溫。基本原則是循序漸進，不宜操之過急。」

註：以上內容僅供參考，人人體質有異，如有疑問，請向醫生查詢。

Text：Fion

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