Q:

飲水也有學問?醫生點出 5 大飲水陷阱!

飲水也有學問?醫生點出 5 大飲水陷阱!
A:

人體有 70% 由水分組成,因此適當補充水分對健康至關重要。不過,你又知不知道,原來喝水也有技巧?若喝水方式不正確,更有可能對身體造成負面影響。快來看看 5 大喝水陷阱!

 

1. 飲水不足

一般健康成年人一天的飲水量建議約為 30-35cc x 體重 (kg)。以一位 60kg 的成年人為例,每天應攝取 1800 - 2100cc 的純水,並根據自己的活動量及排汗情況適度調整。

許多人誤以為咖啡、茶等飲料同樣能補充水分,但其實這些飲品多含有咖啡因,具有利尿作用,反而容易加速水分流失。真正能有效補充體內所需水分的,還是純水。長期飲水不足,除了容易引發脫水,對腎臟健康的影響尤其不容忽視。腎臟是負責過濾血液、排出體內廢物與毒素的重要器官,必須有足夠的水分才能順利運作。

當身體水分不足時,腎臟過濾廢物的能力會下降,尿液濃縮,毒素更難排出,長期下來不僅會增加腎結石的風險,還有可能導致慢性腎臟病。

 

2. 飲水過多

不要以為多喝水就一定對身體有益。其實,飲水過量也會增加腎臟的負擔。腎臟的主要任務是調節體內水分和鹽分平衡,並將多餘的水分排出體外。如果短時間內喝太多水,腎臟需要努力工作來排除這些過多的水分,長期下來會讓腎臟承受不必要的壓力。

此外,過度飲水會稀釋身體內的電解質,讓腎臟難以維持正常的生理平衡。您可能會感到頭暈、乏力,甚至出現手腳腫脹等不適。

 

3. 偏好礦泉水

特別喜愛礦泉水的人士也要注意了。礦泉水含有豐富的礦物質,如鈣、鎂、鈉等,雖然適量攝取對人體有益,但若長期、大量飲用單一品牌的礦泉水,容易讓某些礦物質攝取過多,反而加重腎臟的負擔。腎臟需要持續調節體內的礦物質濃度,當這些物質過多時,腎臟就得花更多力氣將多餘部分排出體外。

此外,不同品牌的礦泉水成分也會有差異,長期只喝一種,容易讓身體礦物質攝取失衡。對於腎臟健康或有特殊疾病的人,更要留意水中的礦物質含量。

 

4. 睡前飲水多

不少人都有睡前飲水的習慣,認為這樣可以預防夜間口渴。然而,睡前喝過量水反而可能影響睡眠品質。

當你在臨睡前喝太多水,夜間腎臟需要加班處理多餘的水分,導致你半夜頻繁起床上廁所,影響深層睡眠,讓第二天精神不濟。此外,夜間腎臟原本就會減慢過濾速度,過多的水分反而增加腎臟負擔,長期下來不利腎臟休息與修復。

 

5. 運動後狂飲水

運動後,水分會因排汗而大量流失,許多人習慣運動後立刻大量喝水,試圖立刻補回失去的水分。但這樣的做法其實並不理想。

運動後腎臟功能會暫時調整,若一下子喝下太多水,腎臟需要在短時間內處理大量水分,無形中加重負擔。此外,快速大量飲水還可能稀釋體內的電解質,讓您感到頭暈、噁心,身體反而更不舒服。

運動後補水應採取「少量多次」方式,慢慢補充,並注意是否需要搭配電解質飲品,幫助腎臟維持體內平衡,身體恢復得更好。

免責聲明:
  • *所有研究及臨床數據應作為參考用途,實際效果因個人體質而異。
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