Morning. In that case, at a maxHR of 185, 140bpm is 64%WHR. If your maxHR is higher then %WHR will be lower. I do all my long distance runs peaking at this 64%WHR too.
just adding my name to the list. crosscountry Pat Dave Roberts 2 galloper Hippo Mackem Nellie 64 Nellie 64s sister Shades Speedy G Steady Suffolk Punch