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apple-watch-hr-tracking-vs-polar-h10-chest-strap - Die at Your Peak - Stronger & Healthier as We Age
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Optical vs chest strap heart rate monitors - Measuring beats per minute using different sensors
Oura Ring Workout HR vs Chest Strap and Coros: first picture is a 5km Outdoor Run and second picture is a 30 mins indoor Assault Bike workout. : r/ouraring