Oura Ring also ran a study on this (which I was a part of). It is interesting because in 2019 I had a severe cold and the Oura Ring gave me a very low "Readinge

Oura Ring also ran a study on this (which I was a part of). It is interesting because in 2019 I had a severe cold and the Oura Ring gave me a very low "Readingess" score in the 2 days leading up to it, despite me feeling fine and getting good sleep. I had never had readiness scores so low prior to that or since, so I don't believe it was any sort of confirmation bias. Quantified health is going to bring about some amazing QOL improvements that we're still only beginning to understand and it is one of the areas I am most bullish about for sure.