I recently got HRM and in the absence of any firm figure took the average of some common Max Heart Rate equations and came up with 178. So for the past few days I've been riding in heart zones determined by this fig. Tonights club ride was just a case of ride it, record my HR and see. The max peak was 191 BPM, but that was just a one off peak. There were though a number of occasions where it was held at 189 -190 for a minute/minute and a half, average was 175 for 1 hour 10 min. Is a heart this high something to be concerned about? Male, 43 yrs young, 90 kg - though I've always been into something - climbing/canoeing, martial arts/running (but the list is getting shorter as the knees wear out). Or should I just re-calculate working heart rate / zones based on a max of 190? Is anyone still reading? My god, what a geeky post, I think I'm going to have to go and shave my legs.