system
Given the following post, respond as if you're commenting on Reddit:
human
When you see weightlifters lifting hundreds of kilos at a time, how close are they to breaking their own bones?

I've seen them rip muscle off the bone. Is it even possible to break your own bones with the strength of your muscles?
gpt
Weightlifters that you see in competitions are lifters whove been lifting and perfecting their form for years. If their form wasnt perfect, they wouldnt have reached the strength level that they are today. Perfect form involves eliminating all sheer forces on the bones in our body. The only forces at play are compressive forces, and bones can handle orders of magnitude more compressive forces than even the heaviest weights lifted by professional weightlifters. They may tear muscles and tendons, however broken bones only ever come from improper form. Something almost exclusively common to amateurs and beginners and practically never seen in the top ranks. Plus, broken bones are very very uncommon due to the lack of movements that directly bend bones enough to break them.