This is called a kegel exercise and it can be done to strengthen the pelvic floor.

这被称为凯格尔运动，能够锻炼盆底肌。

Stress incontinence treatments typically focus on strengthening the external sphincter muscle by doing things like Kegel exercises.

压力性尿失禁的治疗侧重增强外括约肌的收缩力，例如通过做Kegel运动。

This is the reason that it's possible to stop urine mid-stream by tightening up that muscle, which is called doing kegel exercises.

这就是为什么收缩外括约肌可以中断排尿过程，即所谓的Kegel运动。