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
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The best heart rate monitors and best heart rate monitor watches
Garmin Fenix 5/5S/5X In-Depth Review | DC Rainmaker
Road Trail Run: Garmin Fenix 5 Plus Full Review - The Ultimate Garmin? The Ultimate Multi-Sport Watch?
Amazon.com: Garmin Fenix 5 Plus, Premium Multisport GPS Smartwatch, Features Color TOPO Maps, Heart Rate Monitoring, Music and Garmin Pay, Black with Black Band (Renewed) : Electronics