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  5. β-羥基-β-甲基丁酸對身體組成與運動表現的影響
 
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β-羥基-β-甲基丁酸對身體組成與運動表現的影響

Effect of β-hydroxy-β-methylbutyrate Supplementation on Body Composition and Exercise Performance

Resource
大專體育, 第108期, 頁100-106
Date Issued
2017-02-03T17:00:54Z
Date
2010-06-01
URI
https://ir.ntus.edu.tw/handle/987654321/83
Abstract
β-羥基-β-甲基丁酸(β-hydroxy-β-methylbutyrate, HMB)為白胺酸代謝物,未受訓練者及高齡者接受阻力訓練與HMB 3g/d,可增加除脂體重與肌力,對良好訓練的運動員無顯著影響。癌症、愛滋病及類風濕性關節炎患者,體內蛋白質分解作用增加,導致肌肉流失,補充HMB可增加除脂體重。HMB可能的作用機轉為抑制泛素蛋白酶體的蛋白質分解作用,提高mTOR蛋白質合成作用,此外HMB可能代謝為HMG-CoA,作為膽固醇合成的碳骨架,膽固醇可維持細胞功能與完整性。選手限制飲食控制體重,可能造成肌肉流失,需進一步研究補充HMB是否能夠緩減肌肉流失,維持正常運動表現,並探討適用時機及作用機轉。
Subjects
β-hydroxy-β-methylbutyrate; ergogenic aids; protein breakdown; muscle wasting; strength; weight training
Publisher
中華民國大專院校體育總會
Type
article
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