re the 220 minus the age . i have read that the years after 30 only count as half . so if you are 40 , 185 .

Maybe but I’ve never seen more than 168 and I’m 45. Still within the normal range apparently.

220 – age is the roughest of rough guesses. I’ve got a mate who wins triathlons in his age group and he’s never seen 170. On the occasion I’ve matched him on the bike we can be riding along at the same speed, me at 165, him at 140.

56 and mines 178, thats measured by a cardiologists remained fairly static. I see similar results on my garmin over the year. Its high normal he says in a wide range. Were all different this isnt like MPH on a speedo dont expect to match anyone else. The formulas are just a guide, I should be 164