遅発 ちはつ せい筋肉 きんにく つうでしょう
chihatsuseikinni kutsūdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 遅発性筋肉痛

1. Probably delayed onset muscle soreness.

Polite
Presumptive
Conjecture
Medicine