Posted: Today at 15:59
Slightly confused by all these mnethods I created this spreadsheet formula which takes account of MHR, WHR, HAAD, P&D etc. https://drive.google.com/open?id=0B-cYrnigloEybWloNFlzTWt4Mkk&authuser=0 (go to Open and add your MHR and RHR and hit Enter)
Since this original post, I have come across Matt Fitzgerald's method of also using a percentage of your lactate threshold.
Mine aren't as close as yours, Gideon, which adds to my indecision on which to adopt