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 MethodVersionDetailCoros6Maximum Heart Rate1Main Coros Max HR SystemZoneLower %Upper %Recovery0%50%Warm Up51%60%Fat Burn61%70%Aerobic Endurance71%80%Threshold81%90%Anaerobic91%100%