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08 Mar 2016
斷食減肥 隨時殘爆兼更肥
近年各式斷食養生法紛紛湧現,如流行於歐美的「蔬果汁輕斷食法」(juice fasting)便受名模及影星追捧,更於東南亞掀起熱潮。一日三餐齋飲唔食,就是這方法的大宗旨。倒進肚裡去的,全是果汁、菜湯及清水,以取代固體食物,為期三至十天不等,能否達至排毒、燒脂及速效瘦身等效果,該因人而異;但斷食可能引致的身體損害,卻更值得大家關注。
飲食纖體行業也許深明大部分人也視減肥為終身事業而歷久不衰,單單在英國,這行業的總值已超過二十億英磅。一個接一個的減肥方法大行其道,總令我們相信「新方法一定減到!「叮」一聲就立即變輕!」
英國UP Fitness 資深私人教練Akash Vaghela指出,淨飲果汁或代餐的斷食療法,主要提出兩項主張﹕
每日只可吸取極低卡路里,介乎400至800之間
以指定品牌的代餐來吸取卡路里
然而,更值得關注的是,完全禁食固體食物有可能對我們的身體造成損害,且逐一留意:
1. 最終同肌肉講拜拜
節食減肥最先可同時消耗脂肪及肌肉,而一段時間後所消耗的往往主要只是肌肉。
2. 長遠破壞身體機能
影響包括:減少肌肉質量、動作緩慢、新陳代謝機能失調及增加壓力。
3. 沒肌肉 怎減肥
肌肉是身體提高新陳代謝的關鍵,維持強壯的肌肉質量在減肥階段尤其重要。
4. 蒼白暗啞爆殘樣
攝取過低的卡路里經常引致精神不振及面色蒼白及暗啞等問題,即使磅數減輕,憔悴的倦容亦隨之而來。
5. 難維持正常活動
不同的斷食淨飲療程平均每日提供節食者750至950卡路里,遠低於一個成年人每日建議攝取卡路里的標準。
6. 身體機能大混亂
很多節食者表示曾出現暈眩、過度疲累等癥狀,這些癥狀的出現,表示身體正嘗試維持正常體溫及二氧化碳水平。
7. 壓力變暴飲暴食
當身體受節食的影響,難以維持正常生理機能的運作,身體便會分泌皮質醇,而皮質醇的增加卻導致暴飲暴食。
8. 蛋白僅夠細路份量
一般斷食淨飲代餐療程提供接近70克蛋白質、15克脂肪及100克碳水化合物。這種程度的蛋白質攝取量較適合活動量不大的十歲小女孩,並不適健康的成年人。
9. 阿愁上身灰到爆
低脂肪攝取量經常導致膚色暗啞及關節疼痛。蛋白質及脂肪是重要的營養成份,長期缺乏這些營養將引致健康問題。
10. 不能同時低脂低碳
低碳飲食療程不能成功減肥,是因為低脂肪攝取量並不能補充失去的卡路里。
11. 代餐令你更肚餓
市面上大部份的減肥代餐含有人工合成營養成份,例如果糖粟米糖漿及大豆蛋白。這些人造低質的成份,會向身體發出肚餓的警號,你的身體自然要求吸收其他營養補充,使你更肚餓。
資料來源﹕英國鏡報
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