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FWIW, women are equally competitive in ultra-running, so I suspect the claimed advantages only apply at faster paces & longer gaits.

Or it could be that women's ability to metabolise fat outweighs the mechanical advantage at that point.

Do you know off hand what distance a run needs to approach before women and men are equally competitive?

depends on how you define equally, but probably between 100 and 200 miles https://runrepeat.com/state-of-ultra-running