Thanks a lot for the detailed reply Kurtis! On normal nights, I tend to average probably around 30% deep sleep, so over two hours. Age might be one factor here (I’m only 29), but it might also be the Oura ring itself. While I still think it’s an amazing device, I’ve heard that it’s not that accurate when it comes to sleep phases (especially sleep scientist Matthew Walker has talked about that extensively). So there might be quite a bit of variation in how it perceives different peoples phases. But I think it’s hopefully fairly consistent for one person. So instead of comparing absolute values, what’s probably more relevant is seeing variations in your own data and what causes them. Although if you really think the data is accurate and your only getting as little as 5 min deep sleep it might be worth getting that checked.
Regarding the resting heart rate I think the Oura is very accurate, but there is naturally quite a variation between people. I’m definitely naturally on the lower end. I also used to be an endurance runner (100km+ ultramarathons) and am still working our four to five times a week, so that might also contribute to my low values.