Originally Posted by
woodcraft
Anyway, this led to thinking how an inefficient pedal stroke e.g. forward leg is pushing the trailing leg up, would show up as higher power output with pedal or crank based power measure
Not necessarily. I would
think that the strain gauge would be able to read the weighting of the foot on the upstroke as negative power.
It
could contribute to single-sided inaccuracy, like if one leg is resisting the cranks far more than the other. But that's not really any different from how single-sided measurement inaccuracy is in general.