遅ち筋きん

noun

slow-twitch muscle; slow muscle

Anatomical term for muscle fibers that contract slowly and are resistant to fatigue; often contrasted with 速筋 (fast-twitch muscle).

• マラソン選せん手しゅは遅ち筋きんの発はっ達たつが重じゅう要ようだ。

  Development of slow-twitch muscles is important for marathon runners.