Dear all:
I have some questions relating the coordination of
walking as below and hope someone could help me,
thanks.

1.The key factor of the coordination of walking is the
opposite direction rotation of upper trunk and pelvis
or not?

2.If the answer (question 1) is true, why?

3.In the motion of walking retrograde, the key factor
of the coordination of walking is the opposite
direction rotation of upper trunk and pelvis or not?

4. If the answer (question 3) is true, why?

5.In badminton, the retrograde gait is important. If I
want to analyze the coordination of retrograde gait of
badminton, the rotation of upper trunk and pelvis is
the key point or not?

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