Originally Posted by Fivetenfrank
Last poster was correct.
Low intensity, long rides. If you have to do a video, I suggest the Chris Carmichael (CTS) Tme Trial Video. Lots of sitting in the saddle, cranking away.
Have you DONE the Carmichael TT video? There's nothing "base" or "low intensity" about it. Lots of SteadyState/PowerInterval work. Hardly an aerobic base workout. It even says in the video that it's intended to optimize performance at or above LT.
I'm guessing if that workout is your idea of low intensity, you're doing it wrong.