Fortunately, I have been able to keep my leak rate very manageable now with the F&P Vitera combined with my Knightsbridge Chin Strap. It made a massive difference with that and continues to. My AHI according to my ResMed BPAP Air Curve 10 VAuto is almost always less than 1.0 and 95th% leak rate under 10L. I've even had nights with zero leaks.
All that said, I STILL am very tired all the time. It's a hopeless battle. I have a Fitbit Charge 5 and have been looking at the sleep data it gives. It was relatively consistent with what was reported on several previous sleep studies from a few years ago. Basically my REM % is in the 7-10% range. Deep Sleep (S3) usually 0-2%. Overall sleep time 8-9 hrs a night. Usually 1 hr or so awake according to the watch. My muscles hurt quite a bit, most likely due to two bad shoulders and a messed up lower back. Very stiff and now little movements cause aching. It's pretty depressing as my wife has the same watch and hers reports she gets 20-25% REM and 12% S3 Deep Sleep. She doesn't feel like total crap ever with less sleep than me. She does not use a CPAP.
I try to stay active gardening when possible. I was doing all in my power to start walking a bit, but my body hits a brick wall and it's game over. My muscles don't recover regardless of repeated days of doing an activity. A rheumatologist ran a lot of labs and the only one that was abnormal was my Rheumatoid Factor. It was in the 40-50 range and normal is <15. All other Rheumatoid Arthritis, Lupus, other markers were normal. I'm told it's a pretty vague test and hard to interpret.
I'm very curious if Jason from AXG Diagnostics could delve into my OSCAR data to try to determine my actual sleep stages each night. If I'm really getting under 10% REM sleep nightly at my age, that's bad bad news. I don't have an Apple Watch. I spot checked my overnight O2 levels with the CheckmeMax watch multiple times and numbers looked good. I'm still on 3L supp O2 with a 17/9 BPAP pressure. Sleep doc said all is perfect. My body highly disagrees.