TREADMILL

Green treadmills spun noisily as Class 1-A gasped for air and begged for mercy. Aizawa sucked on a jam pouch and pretended to read a book.

Beads of viscous white sweat dripped down Mina's face. She grinned and said, "Oh no, sensei, I better stop before I destroy the treadmill."

Aizawa looked up from his book. "I wouldn't do that. The acid will lubricate the treadmill and make it spin faster."

"You're bluffing."

"Maybe I am. I'm known for my logical deceptions after all."

With a groan, Mina forcibly held in her own sweat until it felt like she was cooking in her own acid.

Mineta, meanwhile, found his own way to cheat the system. Having strung his spheres across the treadmill, Mineta leaned back and let his legs spin idly.

"Detecting low heartrate," the treadmill said. "Increasing speed."

The treadmill went faster and faster. The chain of balls stretched ominously back. With a snap, Mineta went flying and left a crater in the wall.

Sero had tape wrapped around his feet. Kirishima's hardened legs crackled with every step. Ojiro held his tail aloft to keep it from getting sanded to a nub by the spinning belt beneath him. Aoyama blasted his laser, Dark Shadow sprinted on his own treadmill next to Tokoyami, Ochako made lunar hops with reduced gravity, and Jirou played Eye of the Tiger through her ear jacks. Sato snorted pixie sticks until he resembled a coked-up All Might. Shoji sprouted legs from his back and scuttled like a human centipede. In lieu of a treadmill, Tsuyu did the breaststroke against an artificially generated current in a fishtank.

Powering all the other treadmills, Iida ran on a power generator. To his left, Todoroki carefully froze the overheating engines on his legs, while Yaoyorozu made and dumped gallons of orange juice down his throat.

As Bakugo ran, he flung explosions at the belt beneath him, propelling himself forward faster and striking blows against the machine at the same time. Sweating hard enough to blow up a small country, Bakugo roared, "I won't let you beat me, machine! Is this the best you got?"

"This is not the best I have. Are you requesting an increase in the treadmill's speed?"

"Bring it!"

The treadmill spun faster and faster. Iida whimpered as he was forced to speed up to keep with the demand, and soon, everyone's treadmills got a power surge. Sero flung tape at Bakugo, and Jirou tried stopping him with her jacks, but Bakugo powered on, touting each step as a victory against the machine beneath his boots.

Sparks flew from the treadmill. Smoke curled around the belt, and the treadmill made straining noises.

"My god, he's doing it."

The treadmill gave a piteous groan. The belt snapped, and the entire machine flew apart. Bakugo stood victorious over its remains. His legs had swelled up with such enormous muscles that Arnold Schwarzenegger would weep to see them.

"And that's why," Bakugo huffed, "I never fucking skip leg day."

500

Aizawa gets to be a sadistic bastard for a few chapters. He needed the holiday.

Also, AU where all of 1-A has ginormous leg muscles? Just imagine lil' jelly bean Mineta with thick manly legs.