In a method, at least one electrode is implanted in a pelvic muscle of a patient and a control unit is provided. An electrical waveform is applied to the pelvic muscle through the at least one electrode using the control unit. A condition of the patient is treated in response to the application of the electrical waveform. The condition of the patient is fecal incontinence, interstitial cystitis, chronic pelvic pain or urine retention.