Bowed - the distance between the knee and ankle ‘shorten’… think this is a genetic thing. But as far as i’m concerned, the shorter this distance is, the less length you are creating in each stride; also, you are not as tall as you would be normally, therefore, decreased speed.
This is based on my readings, and may not be true, but an athlete I have consulted in the gym has this and we built his glutes (specifically glute med) up and it made a larger difference for him. Maybe worth a look at?
Hope this provides an insight