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Back研究指出:長輩補充乳清蛋白若未缺乏則無額外益處,運動訓練強度才是關鍵
研究指出:長輩補充乳清蛋白若未缺乏則無額外益處,運動訓練強度才是關鍵
Health
自由时报2 hours agoHealth2 min readChinaView translation

研究指出:長輩補充乳清蛋白若未缺乏則無額外益處,運動訓練強度才是關鍵

Quick Look

恆新復健科診所醫師王思恒引用研究指出,長輩若日常蛋白質攝取已足夠,額外補充乳清蛋白不一定能提升肌力或肌肉量;真正受益者為原本攝取不足者,同時強調運動訓練強度是改善肌力的關鍵因素。

AI-generated summary

Why It Matters

為防止老年人肌力流失,許多家屬認為多吃蛋白質有用,甚至準備乳清蛋白補充,但研究顯示補充效果依賴於原始攝取量。

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2026/09/16 08:23

研究指出,長輩想改善肌力,補充蛋白質須了解日常飲食攝取量才有效益,恆新復健科診所醫師王思恒提醒,搭配執行1件事也是關鍵;情境照。(圖取自freepik)

〔健康頻道/綜合報導〕為了防止老年人肌力流失,許多家屬認為多吃蛋白質腐就有用,甚至還會準備乳清蛋白補充。對此,恆新復健科診所醫師王思恒指出,1項針對衰弱長者的研究發現,若原本蛋白質已攝取足夠,再額外補充乳清,肌力、肌肉量與身體功能未必能獲得更多好處;真正較可能受益的,反而是原本蛋白質吃不夠的人。此外,提醒想要增加力,運動訓練強度也是不可或缺的關鍵。

老年人每天喝乳清,為什麼肌力還是弱?對此,王思恒於臉書粉專「一分鐘健身教室」發文分享,國外1項研究納入295名住在社區的衰弱長者,平均年齡73.9歲,進行12週訓練。所有受試者每週進行2次全身阻力訓練,而且做到接近或達到肌肉力竭;其中乳清組每天額外補充20克乳清蛋白,目標將每天蛋白質攝取量提高至每公斤體重1.2-1.5克。

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每天補20克乳清 整體肌力未多增加

結果發現,乳清組的蛋白質攝取量確實提高,但與只做阻力訓練的長者相比,腿推力量、四肢肌肉量及身體功能部分,都沒有跟著額外增加。經仔細分析原始數據,科學家發現,平常蛋白質攝取每天低於每公斤1.2克的人,補充乳清後,腿推力量比單做重訓者,多改善約6.4公斤;蛋白質攝取量低於0.8克的人,則多進步10.9公斤。

長輩沒力 先看蛋白質、訓練夠不夠

王思恒表示,這並不是說乳清沒有用,而是提醒蛋白質並非吃得越多越好,應先確認長輩原本是否攝取足夠。若三餐缺乏穩定蛋白質來源、近期食慾變差或體重持續下降,補充蛋白質才有意義。

此外,王思恒也提醒,以臨床經驗來看,不少長者真正的問題仍是缺乏訓練,日常身體活動量又不足。因此,考慮要不要替長輩買乳清補充之前,除應先檢視三餐蛋白質攝取情況,也應留意運動訓練強度是否足夠,而非只靠增加蛋白質攝取就期待提升肌力。

Open Questions

  • 長期補充乳清蛋白是否有其他健康影響?
  • 不同運動類型對肌力提升的具體效果差異為何?

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