Hi David
The information is at “5. Set up your 80/20 heart rate zones” from the link above, there is a example with a LTHR of 165 and a corresponding table with breakdown of heart rates for the 7 zones for 80/20. The next table shows the same breakdown of heart rates but plotted in the garmin set up for the zones. The query is for the Y zone which for 80/20 is low 165 high 168, but the table for the garmin set up it states use bottom of Y which should be 165 but in the table 168 is used. Not sure which is correct what it says or what is written?
Thanks
Mark