maybe phil heath uses a mouthpiece. i use a cpap but highly recommend also using a mouthpiece that slightly juts the lower jaw forward allowing better chance of airway staying open in deep sleep. experiment - lie on back and jut lower jaw as forward as you can. now breath through mouth for about a minute and tell me that doesn't make a difference.
also sleeping on stomach (which is not always the most comfortable) will allow gravity to play a part on throat tissue or tonsils in keeping airway open. tissue that constricts airway while sleeping on back can fall somewhat forward when sleeping on stomach.
all three combined "may" help combat the very worst obstructive and central sleep apneas. these are nothing to play around with. the main symptoms are ABRUPT awakenings. they can be startling and accompanied by feeling like someone has screamed at you or scared the wits out of you as you drift into peaceful sleep. these most likely indicate central sleep apnea combined with obstructive sleep apnea - brain doesn't send proper signals to the muscles that control breathing. upon waking from those, your heart feels like it will explode. i've experienced that often.
check your blood pressure - i'm going to try a fitbit to watch it while sleeping. count yourself fortunate if your cpap alone has your sleep apnea under control
i use all three - cpap machine, pure sleep mouthpiece and trying to wake and turn to sleep on stomach. i also use melatonin to allow me back into REM sleep when abrupt awakenings occur.
[ame="https://www.youtube.com/watch?v=lf02V_WnO6k"]PureSleep Mouthpiece Review - A detailed description, fitting, and opinion - YouTube[/ame]
also read this...
http://www.professionalmuscle.com/f...ver-posted-about-tart-cherry-juice-sleep.html