Spinning my wheels… my pwr and HR zones don’t make sense.
I’ve been doing a base training program for two months using training peaks. Requires many workouts in Z2. When I’m on the trainer I have a power meter. Based on my most recent FTP of 241, my Z2 is 135-182. When I set my my trainer to erg mode of 170watts, my HR hovers around 130 bpm plus or minus 5.
Now when I did my FTP test my Threshold HR was at 179… so when I set this up as my Threshold HR, my Z2 Heart Rate is supposed to be 145-157… a whole 15 bpm higher than what happens on my trainer at my PWR z2. Now, when I hit the road or trails with just my heart rate monitor, I have zero idea what zone I truly operating in.
Any advice? What am I missing here.
Thanks in advance!