Originally Posted by
gregf83
HIIT intensity levels are often specified as a function of Pmax where Pmax is the maximum power in the last 30S to 1min of a ramp test. The intervals can be done at 60% of Tmax where Tmax is the time you can sustain Pmax with a rest of a fixed time (120% of Pmax) or when HR drops to 65% of HRmax.
I don't think an FTP estimate is of much use for HIIT as the intensity a given rider can sustain for short durations is not well correlated to FTP, i.e. sprinter types can sustain relatively higher intensity for short durations than TT specialists.
Ref:
Interval training program optimization in highly trained endurance cyclists
Personally, I find these types of intervals much easier to do outside on a hill. I get enough intensity with zwift races or group rides.
Thanks, interesting material. So, it is much more complicated than alternating for a number of times "full throttle" and resting periods: identify Pmax with ramp test, then identify Tmax as maximum time at Pmax, then calculate the elements of the intervals...
And, overall, none of those can be done without a power meter - either on the road or indoors with the trainer. Difficult topic.