| I recall reading a paper that found that compared to clinical sleep study equipment (you know, electrodes all over your head) that most devices were random at best in terms of measuring REM sleep. I did a lot of research when a friend went all in on sleep monitoring and wound up worse than when he started (worrying over data). I didn't exhaustively research but based on un-biased available science I found at the time, any investment (in devices/apps) was not worth time and money. Maybe that has changed. See https://www.nytimes.com/2019/07/17/technology/personaltech/s... "For a person to be worrying about their sleep stages is like being worried about the gas makeup of the air you're breathing in," he said." For study see https://nutritionalrevolution.org/2019/07/20/why-the-oura-ri... ""From EBE analysis, ŌURA ring had a 96% sensitivity to detect sleep, and agreement of 65%, 51%, and 61%, in detecting "light sleep" (N1), "deep sleep" (N2 + N3), and REM sleep, respectively. Specificity in detecting wake was 48%." Specificity in detecting wake was 48%! If this was a medical test, it would never be approved by FDA." The NYT article summed up reality for most nicely: "Dr. Vallat told me that if I really wanted to get better sleep, I should simply try to sleep and wake up at the same time every day — that would help my brain learn how to build a structure for optimal sleep. He also advised making the bedroom a cool environment (about 68 degrees) and as dark as possible; avoiding alcohol in the evening; not checking email or social media right before bed; and asking myself each morning when I woke up, "Do I feel refreshed?"" Stop drinking and watching tv/screens and go to bed on time... don't need an expensive ring or watch to tell you this... |