Originally Posted by
bikerjp
I'm not sure I agree with this. Previously I never saw above 187 so by this thinking my max is 187. But today I hit 190 so 187 isn't my max. Did my max HR increase or did I simply get closer to my true max? I'm guessing the latter. People don't usually see their true max. I don't know what my true max is but I'm betting it's above 190 though probably not much.
If you're relatively new to cycling or are increasing your training significantly it's not unusual for your MaxHR to increase. Your MaxHR is not simply dependent on your heart but on a complete system including your muscles and the energy transport mechanisms. Most people have a different MaxHr for various exercises, i.e. running Max will be different than cycling Max which is different than cross country skiing max.
At the end of the day it's a pretty meaningless number that has limited value for training.