So if it is bad to do intensity early in ride because it would shut down fatox for 20-30min, why is fat ox happening after the first 4min interval. All the remainder intervals should be carbs only. But no, the first 2min of each 4min interval runs on fat!
Similar, Andy Coggan shared this (I posted it in this forum somewhere). Alternations of 15min intervals, sub-LT1 and at FTP. After each FTP interval fat ox would be restored almost immediately to the level expected for sub-LT1
And finally this here, I’ve probably already posted this a dozen times in this forum:
it takes 4-5min after an all-out effort to restore fat ox. And even to an elevated fat ox level. This is why many coaches prescribe this priming efforts for time crunched athletes. Elevated fat ox is about the level you would see when doing fasted training.