In our last installment, I started experimenting with sleep tracking in hopes of recovering better for my weightlifting sessions. I’ve used the Oura ring and Whoop band, but today I’ll talk mainly about Oura—my favorite of the two—and about what metrics I found useful.
source https://vitals.lifehacker.com/what-its-like-to-track-your-recovery-with-the-oura-ring-1846144304