Preface: I race pretty much exclusively on a TT bike. I do the ramp test in aero, and set my FTP from that position. I try to do all my ‘work’ intervals in aero, and even recover in aero when I can (unless I’m really gassed and then I’ll sit up for part of the recovery).
Question: During a really hard interval, for example a longish VO2 or a very lengthy threshold interval, I sometimes have to bail on the aero position towards the end of the interval. I can get through most of the interval in aero, but there often comes a point towards the end where I have to choose between (a) not completing the interval, (b) lowering the intensity, © a quick backpedal, or (d) sitting up and completing it upright. Up until now, I have always chosen (d). Is this the optimal approach? Does completing it out of position take precedence over staying in position? Is there another approach that is better?