# Advantages of Bowlegs in Humanoid Species

In an Earth-like planet filled with humanoid creatures (upright, two legs, two arms, head, etc.) the inhabitants have evolved to grow bowlegs.

The question is why? What advantage would it bring them?

From what I have read, bow-legs predispose you to arthritis (due to uneven stresses on bones: https://en.wikipedia.org/wiki/Genu_varum), as well as make you a bit shorter.

Note: This is genu varum - the bones themselves are straight, it is their alignment which is wrong. No bones are curved.

• bow-legs predispose you to arthritis - a link would be very much appreciated, thank you. Mar 30, 2020 at 0:50
• Riders would benefit - think mongols (nomadic, large steppes, herding, etc) Mar 30, 2020 at 0:53
– bio
Mar 30, 2020 at 2:34
• from google apparently the advantage is make them can run faster, "People with bowed legs have knees that whip inward as they step off from one foot to the other. This inward motion of the knees drives them forward and helps them run faster." though i dont know is this the same bow leg you mean or not. also kicking since soccer or football player get this bowleg apparently. Mar 30, 2020 at 5:40