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Incorrect moment diagram in squat article?
Hi Mark.
In your Squat Mechanics: A Clarification article you include the following diagram: Attachment 6982
A dotted line indicating a moment arm a perpendicular distance from the barbell to the knee joint has been drawn. I think that is incorrect.
The knee joint does not 'see' the barbell. The knee simply joins the femur and shank, and since there are no external loads on either of these segments, the knee experiences no external moments.