Trivia 100% muscle usage is different from peak human strength in that it has little relation to actual muscle mass While having denser muscle mass does increase one's overall strength, someone of average physical strength who uses 100% of their muscular capability may be capable of overpowering someone with peak human strength (who would be using the normal percentage) You know those memes of ultra instinct shaggy and how he never used more than 1% of his power Shiki did that, but with 10%. Most anime fans, especially shonen fans, are familiar with power scaling The heroes of any action series need to grow into their power to fight stronger villains
However, not every anime hero is capable or even needs to use their full strength when fighting their enemies. No, i thought you were talking about the title The manga scene is from r/anime_irl or r/animemebank, one of them Remember that weird kid that studied latin as an entretainment I'm unable to write or speak it, but i'm quite good regarding translations and transcriptions (i have lost some knowledge nonetheless). Instead of hoping to outmaneuver enemies, these anime characters rely exclusively on brutal physical strength in order to defeat them.