I would love to know and have not been able to figure this out when I am trying to lift extremely heavy objects. I always end up hurting my back or shoulders because I don’t know how you force the legs to lift things while you are standing on them in one spot or moving. Are you also supposed to be lifting with your legs while you’re walking the heavy object to its destination?
In: Physics
The power comes from your legs like a squat.
Your back stays more or less upright the whole time, but you bend your knees, grab the item, then stand back up. Most of the exertion comes from the front of your legs, butt, and hips.
This posture puts your strongest parts to work.
If you do the opposite, you risk injuring your low back because those muscles are smaller and weaker than our thighs and butts. For most people the low back usually only helps you stand upright, it’s never really doing extra work to get strong like the thighs.
If your legs are straight, and you bend over at your waist/hip like you are going to tie your shoe, and then stand up carrying something heavier than a few pounds, all the pressure of the movement comes from around the spine. It’s usually not strong enough to protect itself and throw around heavy stuff so thats a common source of injury.
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