Some thoughts on Vo2 intervals.
I tried the KM Hard start intervals and got half way though the second one and blew. Session over. There is nothing worse.
Tried again using high cadence but a constant power and had a great session, HR was responsive and accumulated a lot of time above 90% with 5 x 3 mins Reps and 2 mins rec. A good session.
Now, I am new to doing Vo2 intervals like this, especially indoor, and maybe after a few weeks of constant load intervals and adaptation I could try the hard start again, but think I the risk here is the hard start intervals are so hard and/or difficult to pace the danger is sacking Vo2 work off altogether.