I dont think its those either or both alone. But I do think that high blood sugar can play a role. My A1C with my first appnt with my primary back in feb this year was 9.3. Since then I changed my eating habits alot and lost close to 30 lbs. Im hoping my current a1c dropped by at least close to 1.0 pts or close to it if its under 1. Back in feb i had a real nasty sleep jerk in my back when it suddenly lunged forward and I didnt think much of it. got up from the couch and went to bed and slept for 1.5 hours and woke up. Since then its been like that ever since. My sleep cycles avg 1-2 hrs. now its getting more shorter A lady from my sleep doc just called me just now and theyre trying to get a 2 day sleep study on me set up for tonight. Which I hope I can get