Troubleshooting your heart rate monitor/strap HR spikes | DC Rainmaker
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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Heart rate monitor not working? Try these things – Joyful Triathlete
Fix: Garmin HRM Heart Rate Monitor Strap Not Working After Battery Replacement - YouTube