In health stats you see a MHR with an option to change the value. Is that number a default based on my age or a number calculated based on my activities? Where can I see the number my 255 is using to calculate training zones and the like?
1) yes, it should record new MHR automatically, if you know your actual max hr cause you just changed the watch or tested with a chest strap or in lab you can manually update it.
2)garmin connect/watch icon on top/user profile/hr zones and power zones
