Being locked in has at least one advantage.
While you are pushing the pedal with one leg the other leg can be pulling on the other pedal. You get more power. Granted that means the legs get no pulsing rest.
Alex
"There is a cult of ignorance in the United States, and there has always been. The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that "my ignorance is just as good as your knowledge."
-- Isaac Asimov