There seem to be a lot of really fast bow-legged runners. I was thinking about this after seeing that Zach Bitter crushed the AR for the 100 miles. Zach is very bowlegged and has a rocking, rolling running style. It makes you wonder if it more efficient.
Bernard Lagat has the same rocking style and is bowlegged, and Symmonds is the same way.
Paula was (is) quite bowlegged as is Kara and, especially, Kim Smith. They seem to have done all right. They don't tend to rock so much, and actually they seem a little stiff. Abdi is a male example of the "stiff bowlegged runner).
Thoughts?