Hi, I've measured my sleep twice now, the sleep app seems to work quite well. All night was registered and deep sleep 45-50 minutes, sleep score 71-75. My blood oxygen went below 90% for 1.16 minute the first day and for 3.35 minutes the second day. The lowest I hit was 82% so far. I don't think I had sleep apneu, I don't snore much and my build is lean, I'm 53 years old. Or do I? I'm curious to know how much time other people hit levels below 90%.
If you are sleepy during the day, I'd check with a doctor. I had similar readings and I am not overweight according to BMI. I did a sleep study and was diagnosed with mild sleep apnea which can cause long-term issues if not addressed.
Update: I've measured sleep for more than a week now and I get a bit of below 90% every night, 1 up to 3 or 4 times, 25 seconds up to 4 minutes but then usually there is a dotted line. Sleep score is good though, above 70 usually while for my age (53) 49 is apparently the average. However, i read the Sleep Health Article and noticed that my graph looks just like the A-graph for normal people in the article, a bit better actually, and not at all like the B-graph. The short peaks below 90% are called "transient false recordings" and I've had less of them than in the example. https://www.sleephealthjournal.org/article/S2352-7218(22)00058-4/fulltexthttps://www.sleephealthjour...
Thank you SunflowerSweetle. I don't think i'm more sleepy during day time than I ever was.... I would be curious to see what your sleep graphs tended to look like, for comparison. The research in Sleep Health Magazine about the 4 watch suggests that incidental short dips below 90% are transient false recordings... Here are two of my graphs and the graph in the research that shows a normal person in A and a person with very strong apnea in B. The "normal" person gets below 90% quite a lot. Curious if yours compared more to person A or person B.