10/21/2022
https://www.fbbbrown.com/tips-for-better-optical-heart-accuracy/
Yes, the Garmin’s first, second and third generation optical heart sensor hardware produces results with lower values than the Chest HRM. Why is Optical Heart Rate generally lower: 1.) Wrist movement 2.) loose watch fit 3.) poor sensor contact 4.) hair, sweat or dirt will affect the values too...