The intervention group will perform the pelvic floor muscle trainning (PFMT) plus the use of vaginal spheres, while the control group will perform the PFMT treatment only, daily at home. The study will be conducted on women with stress urinary incontinence. The intervention will last four months and will consist of a monthly session with the physiotherapist, doing a total of 4 sessions and the final assessment.
Asess if adding vaginal spheres treatment to the conventional Pelvic Floor Muscle Trainning (PFMT) produces a greater decrease in the severity of the stress urinary incontinence or a greater perceived quality of life related to incontinence.