When ZWIFTING I will usually keep it around Z2-Z3, but when there is a short sprint segment, I lose all self control and go all out, which is a measly 500-600. I figure that I can fat burn but also get some good aerobic bumps. Feel like a bit of an @$$ when people are pacing me or vice versa and there is a sprint and off I go. But that’s ZWIFT for ya.

One purely speculative observation, is that after doing more Z2-3 I don’t feel like I have the sustained power I once had. Yeah, I can do plenty of miles 60-70-80 but would prefer to have both. Maybe it’s a trade off.