Lets say there is this guy, he rides only hills, every single pedalstroke is for the uphill. If he is going to descend, he gets into the car and drive to a point when it is all uphill again. No flats, no nothing, only uphill. You get the point. What is going to happen to the guy??
Will there be muscles that are not worked compared to when riding the flats? Will the guy be stronger in the flats than other people? Will he just turn into a real lean climber who cannot do the flats at all? I really want to know what muscle groups are worked too, is it every single muscle in the body?