Also, the discs (spongey thingies) that help keep the spine (back bone) erect (boner-like) are not vascularized (they have no blood tubes).
They need movement (lots of back bends in all directions) to passively exchange oxygen and food with CO2 and waste (not die).
So, do lots of “cat / cow” and side bends every day to keep those discs healthy as long as possible, and that back hunch at bay!
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