PSA: Look at the heart rate sensor of your fenix 5. Has it cracks like mine? If yes, it's a common problem. Send it to Garmin and get a free replacement. Do
Amazon.com: Garmin fenix 5 Plus, Premium Multisport GPS Smartwatch, Features Color Topo Maps, Heart Rate Monitoring, Music and Contactless Payment, Titanium with Orange Band
Garmin Fenix 6 vs Fenix 5 Plus vs Fenix 5: how the models compare
HEART RATE MONITOR GARMIN FENIX 5 010-01688-00
Hands-on: Garmin's New Fenix 5 Multisport GPS Series–with mapping! | DC Rainmaker
Garmin Fenix 6 vs Fenix 5 Plus vs Fenix 5: how the models compare