Does Oura Ring 5 Measure Heart Rate Accurately? 24h and Chest Strap

Can a smart ring really track your heart rate? I put the Oura Ring 5 against a chest strap for a full 24 hours — sleep, six workouts and all. How Oura samples heart rate Where the ring nails it (sleep, correlation 0.90) and where it falls apart (sport) The morning gap: 67 minutes with no pulse — and the reason behind it Chest strap vs Oura, quantified: correlation, mean error, bias 00:00 Intro: can a ring track your pulse? 00:53 The setup: chest strap vs Oura 5 02:10 24h trace: strap vs Oura 02:37 Why Oura leaves gaps 03:30 Sampling rate and battery 05:09 Night and sleep heart rate 06:36 Morning gap and external source 08:00 Workouts: Halfbike and soccer 09:13 Resting accuracy, graph and verdict Pavel from — smart ring tester and biohacker with 6+ years of wearable data. I wear more smart rings at once than most people have fingers. I test, I measure, I tell you what I think.