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用显微镜看肌肉时, 肌红蛋白 (肌肉细胞中一种具有传递和贮存氧功能的蛋白质)多的颜色有些红,因此称作红肌肉;相反少的显得白些,因此称为白肌肉。 红肌(慢肌纤维)和白肌(快肌纤维)的比例主要由先天遗传决定,但后天的训练和生活方式可显著影响其功能表现和适应性。 这两类肌纤维的分布差异,是人体适应不同运动需求的体现,同时也存在个体间的基因差异。 红肌肉(慢肌纤维)和白肌肉(快肌纤维)的主要区别在于代谢方式、功能特性及结构组成。 红肌肉富含肌红蛋白和线粒体,适合 持久有氧运动;白肌肉依赖无氧代谢,擅长 短时爆发力活动。
大多数人红白肌的比例各占50%,故速度和耐力比较均衡,都不是很出色。 如果你的速度好而耐力不行,那你的白肌会相对发达些;如果你耐力好而速度能力不行,则红肌相对发达些;如果两者都相差不大,那就红白肌也都差不多了,谈不上谁发达。 无氧运动的供能主要在白肌里,而有氧运动的供能主要在红肌里。 身体的那块肌肉多做无氧,它就会增长很多的白肌(启动快,爆发强,持久力弱),多做有氧,身体那块肌肉就会增长更多的红肌(爆发弱,持久力强)。 前面我们在一篇腹肌训练中谈到了一个肌肉概念。 红肌与白肌,马上就有朋友问我了、什么是红肌与白肌呢? 他们有什么区别,又有什么作用呢?
在健身和运动训练中,我们经常听到“快肌纤维”和“慢肌纤维”,或者“白肌肉”和“红肌肉”这类术语。 它们到底是什么? 对我们的训练又有什么影响? 今天,我们就深入探讨肌肉纤维的分类,以及如何针对不同肌肉纤维类型进行训练。
白肌肉(快肌纤维)和红肌肉(慢肌纤维)是人体骨骼肌的两种类型,主要区别在于 能量代谢方式、收缩速度、耐力及外观。 白肌纤维依赖无氧代谢,爆发力强但易疲劳;红肌纤维依赖有氧代谢,耐力持久但力量较弱。 两者分布比例受遗传和运动类型影响。 大多數的肌肉不是單純的紅肌或白肌,而是同時包含不同比例的兩種肌肉纖維。 我們將含有較多白色纖維的肌肉稱為白肉,含有較多紅色纖維的肌肉稱為紅肉。 红肌锻炼主要侧重于耐力与持久性,如长跑、游泳等长时间有氧运动;而白肌锻炼则更侧重于速度与爆发力,如短跑、力量训练等高强度运动。
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