Activity HR Zone jon.roberts220161@gmail.com 28/05/2026 Heart Rate ZoneOwn System 3 Zone System using Maximum Heart Rate (Version 3)Own System 5 Zone System using Maximum Heart Rate (Version 1)Own System 7 Zone System using Maximum Heart Rate (Version 1)Garmin 5 Zone System using Maximum Heart Rate (Version 1)Coros 6 Zone System using Maximum Heart Rate (Version 1)Coros 6 Zone System using Threshold Heart Rate (Version 1)Coros 6 Zone System using Heart Rate Reserve (Version 1)OriginNo of ZonesHR MethodVersionDetailOwn System7Maximum Heart Rate1Expanded 3 Zone System splitting 2nd and 3rd ZonesZoneLower %Upper %Zone 10%60%Zone 2a61%65%Zone 2b66%70%Zone 3a71%75%Zone 3b76%80%Zone 481%90%Zone 591%100%