Today I started power build and did Williamson+2. (Williamson +2 consists of 4 sets of 6 descending-duration/ascending-intensity intervals from 115% FTP for 2 minutes to 150% FTP for 30 seconds. Recovery between intervals matches the duration of the preceding interval - work for 2 minutes, rest for 2 minutes).
The instructions (not in session) said do the intervals at 100rpm plus. This is not an issue for me as I am happily doing spin ups at 120-130, and have also played on the track. Also even in TTs I tend to average 92rpm. However higher cadences do affect my heart rate.
In this session for the first two sets spinning at an average of around 100-103rpm, my Hr was hitting over 150 and averaging 141 for an interval. So for sets 3 and 4 I dropped the cadence to average c94/95, with the result was that my Heart Rate was far lower and it was far easier for me to get through the set. My average HR for the latter intervals was 135 and I was peaking at mid 140s.
To my question: I was wondering what value the training effect of completing these Aerobic Capacity intervals at a higher cadence was. I can see it for the final sprint interval of the set. I am still training to produce these power outputs, but not a such a high cadence.
Thoughts please you cadence/power experts.