And so arrives that terrible part of the season when the 'ceiling must be pushed up' and the oh-so-painful VO2max intervals arrive. hooray!
I can't seem to find a consensus in the research or expert opinions as to what does a better job of increasing VO2max on the bike: repeated short efforts (a la tabata) or single longer efforts (2-4 mins).
I haver heard adages such as "anything under 2 minutes is only doing anerobic system work" but I've also seen the results of the origninal Tabata study. Huge gains in VO2max.
So I ask, what do you do? Does it work? If say, sets of 6 30s on/30s off hurt a LOT less to me than a 2 minute all-out interval, should I just stick with Tabata-style stuff?