my resting heart rate is about 64 at the moment, but I'm not the fittest of people anyway.

The highest its ever gone though is up in the high 170's, but that was during my rowing days early on at uni and we trained sickeningly hard.

Mine stays high, never realy had a low resting rate and even though I'm getting on a bit it still gets up into the 190's when pushing hard, run it comfortably at around mid 150's when just ambling along on the bike.

Either I've got a dicky heart or HRM.