T
Thing
Guest
Assuming humans evolved/were created to carry around plasma screen TVs.Not quite right. You are very likely to experience back problems if you regularly put more than 740 lbs of force on your L5/S1 vertebral disk. Doesn’t matter how that happens, from over exertion at work, or from carrying around extra poundage.
BTW, the “keep your back straight, lift with legs” advice is very likely to increase the compression force on the disk, if the load is too big to fit comfortably between your legs when you lift. The trick is to keep the load as close to your back as possible, to reduce the amount of force.
The reason it’s a problem is that the vertebrate spine evolved to be mostly horizontal, a framework for quadrupeds. But even a blown disk would be no great problem, if it wasn’t for the fact that the spinal nerve roots were in a position where a prolapsed disk is almost certain to press on a nerve root, causing pain, weakness and disability.