With your knees still bent, you will be better able to move the tailbone forward, move the femurs back, and align the hip girdle over the crown of the head.
原因是,在膝盖弯曲的状态下,才更容易将臀部和尾骨向前收,同时大腿向后伸展,使骨盆在头顶的正上方。
The ligament looseness is most prominent in the hip girdle and leg joints, and it results in a less than sure walking gait.