HRM-dual does not send RR intervals to measure HRV : r/Garmin

Heart Rate Variability (HRV) during exercise

Heart Variability Monitors and Elite HRV Compatible Monitors

Heart rate monitors-advice-tutorial - Concept2 Forum

Heart rate variability and resting heart rate in cycling training

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HeartMonitor

HeartMonitor Requirements for Compatibility

Heart rate variability and resting heart rate in cycling training

Why does HRM Pro Plus not tracking RR intervals? - Accessories & Sensors - Running/Multisport - Garmin Forums

Garmin HRM-Dual™ Heart Rate Monitor with Chest Strap