Today was Power Challenge day in CycleFit. On Power Challenge day, we warm up with easy stuff for about ten minutes, then do four minutes at 100% effort. We measure our average power output over those four minutes. Then we recover and repeat and average the two four-minute challenges together to get our 100% effort number, or upper Zone 3 range. We fill in the rest of our power zones from a chart.
The very first time I did a power challenge last January, I was at 150 Watts. My second power challenge was in March and I was at 180 Watts. Today, 205 Watts. It's awesome to see steady improvement. :)