Eli5: why is it so easy to hurt ourselves when lifting with our back compared to our legs?
In: 2
Our spines are essentially bone disks sliding on jelly cushions. And all that has to be somehow operated by muscles that run right along it. So little leverage, so many points of failure.
Compare that with legs, which have few robust joints and large muscles attached some way away from those joints, giving a degree of leverage.
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