Not as much as you'd think, many of the muscles are in common when you use clipped pedals.
The most important factor in either sport in any case isn't the muscles, it's oxygen intake and use efficiency.
As far as your argument, by effect of selection, doesn't that meant that top runners are more likely to come from poorer countries? You also don't really need a good bicycle to train, just to compete, but even that's pretty expensive so I take your point.
The most important factor in either sport in any case isn't the muscles, it's oxygen intake and use efficiency.
As far as your argument, by effect of selection, doesn't that meant that top runners are more likely to come from poorer countries? You also don't really need a good bicycle to train, just to compete, but even that's pretty expensive so I take your point.