bend your knees

stephenlearner

Senior Member
Chinese
Hi,

Why do people say "bend your knees"? I think they should say "bend your legs", because knees are joints. We bend a straight thing, don't we?

s-l300.jpg
 
  • bibliolept

    Senior Member
    AE, Español
    The most correct way would arguably be "bend at the knees," but "bend your knees" is perfectly understandable and idiomatic in AE. the same is true for "bend your elbow" and "bend your waist."
    ,
     

    Edinburgher

    Senior Member
    German/English bilingual
    We do entertain the concept of the joint itself being straight or bent, depending on whether the angle between the bits that stick out is 180 degrees or not.
     
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