How does sleeping on your stomach hurt your back?

I have heard that sleeping on your stomach hurts your back. But when you sleep on your stomach you back and spine is curved inwards, and isn’t that natural? (At least I have seen pictures of the human anatomy like that.) I don’t understand…

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One comment

  • Nancy Bee

    if u are overweight its bad for ur back because a large stomach causes ur back to curve back more if u lay face-down.

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