Activity HR Zone Register jon.roberts220161@gmail.com 27/05/2026 Heart Rate Zone RegisterOriginNo ZonesHR MethodVersionDetailOwn System3Maximum Heart Rate3Simplest 3 Zone SystemOwn System5Maximum Heart Rate1Own System7Maximum Heart Rate1Expanded 3 Zone System splitting 2nd and 3rd ZonesGarmin5Maximum Heart Rate1Coros6Maximum Heart Rate1Main Coros Max HR SystemCoros6Threshold Heart Rate1Coros6Heart Rate Reserve1Main Coros Threshold System