Another question - Coggan Zones.

My power and HR numbers in no way line up with that chart. My threshold HR per Garmin is 147 BPM @ 255W.

Zone 2 Watts should be 142-191, Max Z2 HR should be 122. I can ride at a conversation pace, nose breathing @ 175W, 130BPM. Well inside of Z2 power wise, well outside of Z2 HR wise.

My Z1 HR should be less than 100BPM according to that chart - I'm barely pedaling along at 100BPM.

My max HR has always been low, highest I've seen in my 50's 166, highest in my 20's was under 180. A very tight HR range.

The zones do not match up at all for me, so now I am even more confused. Follow power or HR? I've been following power for the past 1.5 years.