Comparison of active and passive forces of the pelvic floor muscles in women with and without stress urinary incontinence.

Background: The reduction of the pelvic floor muscles (PFM) strength is a major cause of stress urinary incontinence (SUI).

Objectives: To compare active and passive forces, and vaginal cavity aperture in continent and stress urinary incontinent women.

Method: The study included a total of thirty-two women, sixteen continent women (group 1--G1) and sixteen women with SUI (group 2--G2).