Originally Posted by cslone

I was taught that SST is to "push" the FTP up, where 2x20's are to "pull" it up. Therefore, I do my SST at ~90-94% and my 2x20's as hard as I can go, which ends up being like 10% over my FTP. I may be wrong, but it's starting to come around for the little time I've been back on the bike.

HR fits inline with that for me. At SST, I'm maybe 85% LT and above it on the 2x20's.