Why is lifting items “with your back” dangerous? Why can’t back muscles be strengthened?
In: 17
Your spine is [chunks of bone strung together with discs of jelly inbetween](https://www.builtlean.com/wp-content/uploads/2016/04/Herniated-Disc.jpg).
The jelly is tough, but not indestructible.
When your spine is upright, the bones remain parallel, the weight is distributed evenly all the way around the discs, and they can cope with that easily. Even if you lift more than your own weight, it’s nicely spread out.
If you put strain on it while it’s bent, however, it pinches the shit out of those discs. Imagine sticking your fingers in the hinge-gap of a door – how hard would someone have to push it, to mash your fingers to hamburger?
And once you fuck up a disc, it *stays* fucked.
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