I’ve never used heart rate before, just power. I recently started using Garmin HR with my Wahoo Bolt, and suddenly my calories seem really low? like 285 for a z2 ride. My intervals seem normal, which is pretty close to my power output.
I do have a pretty low HR despite my age (max is just under 180 and i’m 30).
This is on Training Peaks, haven’t done a TR workout with HRM yet.