Originally Posted by
baribari
Obviously more power means more fatigue, but in this case I mean that the correlation between fatigue and power changes due to using leg muscles that aren't usually used to generate power.
Meaning proportionately more fatigue for every bit of extra power (while sitting).
You're more likely just going anaerobic to get the extra power. Pedaling in "full circles" is a bit of a meaningless term and generally means you are unweighting the pedal on the upstroke. The vast majority of power still comes from the downstroke.