52 y.o. male here . . .
It's been a little over a year since I got serious about fitness and monitoring actvities closely. I started out with a max hr (recorded) of 187. In a few months I was sometimes getting to 189. This summer during intervals I would hit 191. Last week I see I've now hit 194.
Is it typical to see max HR increase like this? Should I adjust my training zones accordingly?