I was just looking at my ramp test data i have done today and noticed that power fluctuation on each step looks somewhat too big for my taste. Closer look showed that at the extremes it was +60W / -90W from the target power! The picture looks as follows:
BTW, i did not notice such fluctuation during the test itself, it was normal +/- 10W, what I used to see during training in ERG. Also, did not feel such jumps in resistance.
Checked recent rides and it was on Z2 rides and with some more fluctuation during recent VO2max ride, but not that extreme.
What could it be? I did not calibrated the trainer before the test, as i don’t do this every time, just once a while (recently maybe 2 weeks ago).