When Equius squirms (it's squirming), Midoriya holds fast. There's no point in all this unless he gives it his best effort. He only lets go when bidden, immediately raising his own hands. He passes a sweeping glance over him to make sure nothing is out of sorts, but the hold was designed to just hold, not cause pain.

"Since this is a new way of moving for you, we'll keep practicing until you're used to it. Wouldn't want you to hurt yourself. I had to figure this out too, but in the opposite way, since my Quirk appeared late and I never thought I'd have super strength," he rambles helpfully.