Bike Workout - FTP Intervals

Today was a repeat of the hard interval workout from Tuesday. My plan called for a one hour session with a main set of 2 x 15' @ functional threshold power, 4 minute recovery periods, and a "remainder" of the workout at 85% of FTP. As usual, I did this workout on my Computrainer, so the main set followed a 15 minute warm up to calibrate the Computrainer (which counted against the one hour total).

A graphical representation of the ride is shown below.

Workout Summary

Entire workout (208 watts):
 Duration:   1:00:04
 Work:       749 kJ
 TSS:        77.8 (intensity factor 0.882)
 Norm Power: 229
 VI:         1.1

FTP Interval #1 (262 Watts):
 Duration:   15:00
 Work:       236 kJ
 TSS:        25.5 (intensity factor 1.01)
 Norm Power: 263
 VI:         1

FTP Interval #2 (260 Watts):
 Duration:   15:00
 Work:       234 kJ
 TSS:        25.1 (intensity factor 1.001)
 Norm Power: 260
 VI:         1

85% FTP Remainder (221 Watts):
 Duration:   7:01
 Work:       93 kJ
 TSS:        8.6 (intensity factor 0.857)
 Norm Power: 223
 VI:         1.01