Physical strength in toaru

So what's up with the wildly inconsistent strength that these characters have?

Why can this girl dash between trees like a ninja?

Why can kuroko carry several grown men?

Why can mugino KO a tiger in one punch?

Why can Teshio Megumi kick a cell door down?

And it doesn't even seem to reflect in their appearance either. Kuroko and the girl in the pics are twigs yet they could beat the shit out of grown men.

What's stopping Komoe Sensei from knocking out Hamazura in one punch?

Why isn't Uiharu strong enough to bench press 10x her body weight even though she works out, genetics?