Such a correlation has also been found in non-skeletal striated muscle-the urethrae sphincter of the guinea pig147. 这种肌纤维类型特征间的相关性，也在非骨胳肌的横纹肌，豚鼠的尿道括约肌上观察到。
Pelvic floor muscle exercise is a kind of physiotherapy which increases the strength of the external sphincter by active contraction of the pelvic floor muscle. 骨盆底肌肉训练是一种物理治疗，藉由病人主动式的收缩运动，强化骨盆底肌肉，也随之加强尿道括约肌的力量。
