I started the Pillar free training series just for kicks, and the first workout was Zone 2 for 35 mins with a warm up and cool down. Riding in a hilly area trying to maintain a certain number of watts is a real challenge to say the least. I was constantly over and under by a significant amount depending if I was climbing or descending. It averaged out to be about right (90%) but it was a PITA to constantly be monitoring and adjusting. Yesterday was a 2 hour session doing the same but instead I used my indoor trainer and it was a breeze. I watched Netflix while keeping an eye on ZWIFT on my PC to make sure I was where I needed to be and hit 98% accuracy for my workout. (Today is a rest day and tomorrow is intervals).

So….. if you really need to do and maintain whatever zone and you don’t live in a flat area, a stationary trainer is your friend, plus there’s some good British series on Netflix.