Originally Posted by
caloso
I've always done the 6x5+1 intervals with a 105-108% of FTP target, which is just about the boundary between FTP and VO2max. If I do them right it usually goes something like:
But that's something a bit different. I'd suggest if you're trying to maximize gains in vo2 max, you need to do them quite a bit harder (115%+). And the only way to do that is with quite a bit more rest (generally in the realm of 1:1).
The 6x5x1 is more like something I'd expect to be more specific to FTP (especially in that 105%-110% range) and giving it a bit of a "pull up".