I have been using TR since winter in a combination of inside (with TR) and outside rides (RPE based). Right now I am a LV Build program trying to raise a bit my FTP.
Last week in the plan I had Dade +1, a VO2 max workout with 9 intervals at 120% FTP (2.5 min long) and this week in the plan it is Kaiser +2, a VO2 max workout with 9 intervals at 118% FTP (3 min long). The weather was so fantastic last week that I decided to ride Dade +1 outside in a short local hill that fitted quite well with a 2.5 min climb. My surprise is when I read that Kaiser +2, which is a really similar workout when it comes to number of intervals, lenght of the intervals, rest time and %FTP has a suggested RPE of 9 when Dade +1 has a RPE of 8.
Some details for the analysis:
For Dade +1: 3x2.5 minutes at RPE 8 with 4 minutes easy between intervals.
For Kaiser +2: 3x3 minutes at RPE 9, with 4 minutes recovery between intervals.
Why the RPE is one unit higher? The difference between making an exercise at RPE 8 or 9 is really substancial. Has someone step on similar issues in other workouts?