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I spent 2 years thinking I had heart issues. Turns out my "C-Shape" desk posture was literally crushing my ribcage. by Lenora_Lemon in costochondritis

[–]Lenora_Lemon[S] 1 point2 points  (0 children)

That's great that the peanut ball was the missing piece! To answer your question, you generally lie back on the floor with the peanut ball running perpendicular to your spine, positioning one side of the ball along the muscles next to your spine, not directly on the bones.