Originally Posted by
ljrichar
Don't know how you draw that conclusion. My 1' is 200% of ftp so that interval would be taxing but not impossible. You'd need a couple of minutes rest after each one though.
The interval mentioned specified 1'@150% followed by 3'@105%. That's not much recovery and averages out to 116% of FTP which would be impossible for most people to keep up for 20' unless you had 100% fast twitch muscles.