Red muscle fibers

…The T and L systems are arranged in an L,T,L… configuration at the border between the A and I bands and are called a triad. There are two types of muscle fibers: white muscle fibers and red muscle fibers. The former are thicker, have fewer mitochondria, and contract quickly but fatigue easily. …

*Some of the terminology that refers to "red muscle fibers" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…T系とL系はA帯とI帯の境でL,T,L…という配置をとり三つ組triadとよばれる。筋繊維には白筋繊維と赤筋繊維の2種類がある。前者は，太くて，ミトコンドリアが少なく，敏速な収縮を起こすが疲れやすい。…

※「赤筋繊維」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報