Caveat: I have never ridden a trainer in ERG mode
If you haven’t stopped reading…
Observation/hypothesis: ERG mode is a detriment to your cycling; especially outdoor cycling.
Reason: we don’t have ERG mode when we ride our bike outside, it’s not natural to be held at a specific wattage regardless of cadence. It doesn’t train you to be able to fluctuate power (up or down) in a natural way.
Let me have it