Eighty ( 97.6 % ) patients were free from kyphosis and pelvic retroversion ;
腹部和臀部肌肉的同时收缩使骨盆后倾,并引起腰部曲线变平。
A posterior tilt of the pelvis causes the lumbar curve th flatten and is caused by a simultaneous co-contraction of the abdominal and glottal muscles .