How accurate is the forerunner 945's heart rate data? My average seems quite low considering I'm far from an athlete. I've completed c25k and am working on the 10k program now :
Forerunner 945 – Wrist-based heart rate now available while swimming
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Garmin Forerunner 945 review - Wareable
Garmin Forerunner 945 Review | Tested by GearLab
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