Hauling trash is tiring. Running is tiring. Exercising is tiring. But it isn't tiring enough to deter him.
Also, some things became easier. He can suddenly run faster, do backflips and frontflips, and do exercises properly… He knows exactly how to move his feet and arms for everything to be effective, and he knows how to throw a mean punch.
He can't change the weather with it, he doesn't have a quirk, but he has the skills to knock someone out for sure.
It feels like cheating. He has never had better sleep, lighter steps, more air in his lungs (a part of All Might's skillset is proper breathing. It's amazing.). It really feels like cheating.
Especially when Kacchan attacks him after school.
The explosive blonde targets him a week after the incident, which is weirdly long for Kacchan to wait. Izuku isn't complaining of course, any period of time he was not targeted is a blessing.
"Oi, nerd, what the fuck is your deal with All Might, huh?"
"Uh..?" Izuku replies intelligently. Kacchan explodes the air around them and pushes him to the wall.
"Don't play dumb! I saw All Might take you away after you passed out. What is the deal with you and him!?" Izuku blanks. He has no clue what to say. He can't reveal One For All to Kacchan, especially not in a school setting where anyone could overhear. He can't exactly say he took him home either, that explains nothing and Kacchan would only get madder and that is definitely not a goal Izuku has. "Talk Deku, talk. He your dad or something?"
At this point Izuku's hysteria reaches such a level that it loops right back into calmness. He grabs Kacchan's hand, twists it, kicks him in the groin, and cartwheels away to gain distance.
"I have no idea what you're talking about Kacchan," he says sweetly, then turns around and legs it.
For a second there is silence, and then angry yelling follows him as he runs as fast as possible.
Kacchan leaves him alone after that. It's a miracle.