[choxi]

I developed sleep apnea from poor posture and was able to fix it by correcting my posture. Developing a hunch or anterior pelvic tilt is especially a risk for desk workers and makes breathing harder, a little bit of yoga or posture correction exercises can save you a lot of trouble.

[oarfish]

This sounds implausible, since "good posture" doesn't really have a definition. Is there any data on this beyond anecdote? How do you know your posture was the only possibile explanation for onset and resolution of symptoms?

[EForEndeavour]

How did you monitor your apnea before and after your posture correction? And how does one's standing posture affect breathing when lying horizontally -- is it a matter of breathing muscle strength?