I do most of my riding on the road bike but the TT bike is the one on the trainer. I aim to do as blocks in the TT position but in reality I keep on sitting up to see my laptop and breathe better on harder and longer efforts. I get more power in the TT position for 1-5minutes but finding myself running low on oxygen and looking at the screen and fill my lungs more for another 1-5minutes effort on the ski poles.