system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] How does Coulson’s robotic arm grant him super strength without hurting him?

We’ve seen that it grants him super strength, but how does it work? His arm might be metal, but his shoulders, chest, back, core, and everything else are pure squishy human. How does he use this super strength without hospitalizing himself every time?
gpt
Judging by the bulletproof energy shield he can project from his hand, SHIELD has some pretty advanced force projection technology.  Pure speculation here: its probably based off the repulsor tech used in the Iron Man suit.

Beyond that, prosthetic engineers seem to have solved the reinforcement issue years ago.  Between Bucky's metal arm, project Deathlok, and the burgeoning private transhumanism industry, engineers have figured out a way to do it.