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[–] PraiseIPU 0 points 1 point (+1|-0) ago 

Arching your back that much is really bad.

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[–] Plant_Boy [S] ago 

I can't say that arching back is good for posture, though I don't think back arching helps.

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[–] PraiseIPU ago 

from a physical therapist https://youtu.be/M_7EfA4vLa0?t=236