This workout was so so. Felt tired most the way through and especially fell apart on the last 2 intervals. 82 rpms seemed to be my most efficient rate. I went out too hard on the first interval but feel that muscular endurance was my limiting factor and not aerobic endurance. I will have to look at the quadrant analysis for this one but I am guessing I am mainly in quadrant II with low cadence and higher power. Wanted bigger gains on this one but that seems how it works. 5% gains here and there and then all of a sudden a big jump. Fatigue was playing a factor here since I just completed a 2 x 20 minute effort 2 days ago.