Im only 17, but have had little problems with my back before, (just aching and stuff).
But recently i bought a trampoline and i was fine for a few weeks, then one day, i went on it and it really hurts the middle of my back when i jump.
Its been a couple of weeks now, and the pain still comes when i jump. Its like a sharp pain in my middle/lower back.
Even a tiny little jump on the ground does it, i dont remember hurting my back on the trampoline..so what is this?
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