Unfortunately in January of 2017 I had a major cardiac incident running my 25th marathon. Since that incident checking my pulse while I exercised became a necessity. I always preferred the wrist monitoring as compared to the chest because of the convenience. Prior to my incident, I could not have been a bigger Suunto fan. However, their HRM would randomly spike to 172 bpm which would be a major concern if the measurement was accurate and it never was when compared to a finger on the artery comparison. I gave up on Suunto and went with Apple and had the same problem. I recently switched to a Fenix 5s and have not had a reading over 140 bpm for the last 30 days in the hellish Houston heat. Additionally, the watch is sanely sized so you can wear it all the time and have your bpm at your fingertips. I hope that this information will be helpful to some other similarly situated person.
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