OK, so ' 80% Vox2 vs 170% v02 max ' instead of ' 70% Vox2 vs 170% v02 max ' ...it might yield some difference in result ...though I suspect not much.
how can you say this,the point of HIIT is to get into the anearobic area,so if your at 80% which is the anearobic area,and you stay in that for 45mins surely thats better than staying in it for short bursts.
70% V02 Max should put you at about 82% MHR for a training heartrate
80% V02 Max should put you at about 88% MHR for training heartrate.
I always assumed the aerobic heartrate zone was somewhere below 80% MHR, and that the anaerobic was somwhere around 80%+++++ MHR. But that's jut me. Where do you assume ( i.e re %MHR ) anaerobic training kicks in ?
Both 70% and 80% V02 max would seem to equate to an anaerobic training level of exertion, so that's why I said I wouldn't expect too much difference between teh 2. The difference beween the % of fat vs glycogen used at 82% vs 88% shouldn't be a huge magnitude of difference, but then again, i'd just be guessing.