Originally Posted by
rubiksoval
30 secs on with 30 secs off is more vo2/ aerobic (though there may be more beneficial workouts for that, or at least a different stimulus). Explosive power is built by being explosive, ie, doing maximal sprints.
I don't think 30s/30s are all that great to begin with. What are you trying to improve, exactly?
Initially, it was to improve overall cycling fitness. I have aspirations to try cyclocross racing in the fall.
They have worked well for me. Perhaps I will reach a point at which they lose their benefit, but I feel like I'm not close to that level yet.