Heart rate and power zone mismatches

[onemanpeloton]

I’d refer you to these threads for more detail:

Zone 1 & 2 rides by HR

Listening today to a Velocast podcast, around 21-ish min Stephen Seiler recommends and discusses doing the long slow rides/zone2 by HR rather than power as the power is a measurement of what’s happening to the bike rather than the body and doing these by HR better achieves the goal of reducing cardiac drift over time. Thought it was an interesting point and I may convert some of my z1-z2 plan rides to HR rather than power zone targets.

Heart Rate Zones (HR) vs Power Zones

Should power zones and heart rate zones be in sync with each other? I did a ride the other night and my hr zone average was more skewed towards Z2, whereas power was more Z4. thoughs?