Fitbit versa 3 HR compared to a Polar H10 chest strap during strength training comparison : r/fitbit
Buyr.com | Heart Rate Monitors | Polar H10 Heart Rate Monitor Chest Strap - ANT + Bluetooth, Waterproof HR Sensor for Men and Women (NEW)
PDF] Measurement of Heart Rate Using the Polar OH1 and Fitbit Charge 3 Wearable Devices in Healthy Adults During Light, Moderate, Vigorous, and Sprint-Based Exercise: Validation Study | Semantic Scholar