Re: Training Zones
20min seems to be the time that everyone uses for the threshold intervals. What happens when you do 30min or 15min intervals Obviously the pace drops for 30 and rises for 15, all things being balanced but does 15min push to hard for threshold and 30min not enough? Would not getting really efficient at doing 2X20 with 5 rest mean you could go up to say 2x22 with 5 at the same pace?
I don't use a power meter mainly because of cost, though that's changing, so have learnt to feel my way through training. Has taken many years, nearing on 25, but I do have a pretty good feel for what I'm doing. Though I still make mistakes. I have found the hardest thing to do is not end up in that zone 3-4 when you are just meant to be knocking out a zone 2.
"Even my farts smell like steel!" -Diel