Back from skiing and on the trainer. Today was 3 sets of 5x(30”on 1’off). Max on was z3. I found a higher z2 power and for the off segment bumped the power 25 watts for the on.
I put my Garmin Vector 3 power pedals on the trainer bike and connected the power meter to my Garmin head unit. I put the Garmin Neo Tacx in ERG mode and controlled trainer power from my iPhone.
The Garmin head unit with the Vector 3 was reading 20 watts higher than the power reading from the Neo via my iPhone. I knew it. I completed the warmup.
I recalibrated the Vector 3 and started the first interval. Hmmm, the Garmin head unit is now reading about 8 watts higher. I recalibrated the Vector 3 again and now the Garmin is 6 to 7 watts higher than the Neo. Hmmmm. I would expect the Garmin Vector to read a few watts higher than the Neo due to drive train losses. So it seems like it is reading about right. But I would NEVER use the Neo or any other power coming from a trainer on Zwift.
I definitely feel more force in the bottom of my feet riding the trainer versus riding on the road for the same power. F it. I suck on the trainer. Get over it.
The good news is I am on the trainer again tomorrow for even a longer ride. Yeah baby, I cannot wait for that action.