Despite advances in minimally invasive surgical techniques, conservative methods are still the first choice in the treatment of stress urinary incontinence (SUI). Most of the conservative treatments available today are based on strengthening the pelvic floor muscles, improving their response to increased intraabdominal pressure. The two most commonly used conservative treatments in Croatia and worldwide are Kegel exercises and external magnetic innervation of the pelvic floor muscles. Although they have a similar pathophysiological mechanism of action, there is currently no published randomised clinical trial that directly compares the two methods in terms of clinical improvement of SUI and pelvic floor muscle strength measured with the perineometer. We hypothesized that patients treated with external magnetic innervation of the pelvic floor muscles would have a reduction in the number of urinary incontinence episodes and improved quality of life compared with Kegel exercises. The study was conducted on a total of 94 patients who were randomly assigned to group Magnet or group Kegel. Patients treated with external magnetic innervation had a lower number of urinary incontinence episodes, better quality of life, and higher overall treatment satisfaction compared to patients who performed Kegel exercises during the same time period. This was confirmed by analyzing data from a three-day bladder diary and a specific questionnaire on quality of life and treatment satisfaction. Comparison of intravaginal pressure values with a perineometer between the groups showed a greater relative increase in pelvic floor muscle strength in the group treated with external magnetic innervation compared to the group performing Kegel exercises. Although perineometry may be useful as a new method in attempting to objectify the disease burden before and after treatment, diagnostic tools based on patients' self-assessment should not be disregarded.