Another question regarding cadence. I mainly do 5x4min VO2max intervals in resistance mode on rollers. If I do them with a cadence of between 90-100RPM I can average around 120% of FTP. If I drop my cadence to between 55-60RPM I can easily hit 125%. HR is the same for both cadences. Should I do the intervals at a lower cadence and aim for a higher power, or should I try and get better at nailing the intervals with a higher cadence?