As others have noted, I've had some weight gain, which I think is mostly stomach muscle. In the first couple of months I would wake up alert and mentally rested, but physically tired. In particular my chest muscles would be aching. I put this down to using those muscles more to "fight" the pressure of the CPAP. That's gone away, but now my stomach is getting bigger. I exercise regularly and don't overeat. What can I do?
Another phenomenon: I seem to have lost some "wind". I'm a sometime singer (sing lead in a geezer rock band) and since I've been on the CPAP I seem to get out of breath much more. I've had to change the way I breath in phrasing, so I don't run out of wind.
Even for things like going up stairs, I'm huffing and puffing more. What's up with this? I've never had these problems before - I would have thought this stuff would get better...
Any advice appreciated.