[jruohonen]

Even if it would be spurious, it would be interesting to see whether there is a correlation. (I used to have a Oura ring out of similar interests, but lost it somewhere someday.) Viz newsrooms see also:

https://news.ycombinator.com/item?id=38779439

[jasiek-net]

For me the most interesting part is mood tracking, as many of the psychological methods are based on self-evaluation and here we have an opportunity to gather data real-time without user input.

Glad you came with oura ring as I though about this project as an oura ring for emotional state.