A system for pelvic exercising by a user for treatment of urinary incontinence, the system comprising: an internal unit having a first to be inserted distal end and an opposite proximal end, and a receiver device; the internal unit being adapted for positioning within a body cavity, wherein the body cavity is a vaginal canal of the user; and having a size and dimensions similar to conventional menstruation tampon for retention within the vaginal canal for hours or days, by being substantially cylindrical and having a length L of 3 to 8 cm and a diameter D of between 1 and 3 cm; and comprising at least one pressure sensor and a transmitter within a housing; the receiver device, being remote from the internal unit, comprising a visual display, a processor, a signal receiver, a memory, a power supply and an operating program, such that the receiver device receives data from the internal unit and displays information to the user on the visual display, wherein the internal unit comprises means for monitoring the effectiveness of pelvic exercising by a user selected from the group consisting of: (i) an anchor for attaching to the user, and a distance sensor for monitoring separation of the anchor from the internal unit; (ii) a first piezoelectric sensor configured to detect pressure applied to the first to be inserted proximal end of the internal unit and a second pressure sensor configured to detect pressure applied to the opposite distal end of the internal unit; and (iii) a movement sensor (285, 275) for monitoring movement along the vaginal canal, wherein the internal unit further comprises a flexible tail attached to the opposite distal end of the internal unit for withdrawal of the internal unit from the vaginal canal. an internal unit having a first to be inserted distal end and an opposite proximal end, and a receiver device; the internal unit being adapted for positioning within a body cavity, wherein the body cavity is a vaginal canal of the user; and having a size and dimensions similar to conventional menstruation tampon for retention within the vaginal canal for hours or days, by being substantially cylindrical and having a length L of 3 to 8 cm and a diameter D of between 1 and 3 cm; and comprising at least one pressure sensor and a transmitter within a housing; the receiver device, being remote from the internal unit, comprising a visual display, a processor, a signal receiver, a memory, a power supply and an operating program, such that the receiver device receives data from the internal unit and displays information to the user on the visual display, wherein the internal unit comprises means for monitoring the effectiveness of pelvic exercising by a user selected from the group consisting of: (i) an anchor for attaching to the user, and a distance sensor for monitoring separation of the anchor from the internal unit; (ii) a first piezoelectric sensor configured to detect pressure applied to the first to be inserted proximal end of the internal unit and a second pressure sensor configured to detect pressure applied to the opposite distal end of the internal unit; and (iii) a movement sensor (285, 275) for monitoring movement along the vaginal canal, wherein the internal unit further comprises a flexible tail attached to the opposite distal end of the internal unit for withdrawal of the internal unit from the vaginal canal. (i) an anchor for attaching to the user, and a distance sensor for monitoring separation of the anchor from the internal unit; (ii) a first piezoelectric sensor configured to detect pressure applied to the first to be inserted proximal end of the internal unit and a second pressure sensor configured to detect pressure applied to the opposite distal end of the internal unit; and (iii) a movement sensor (285, 275) for monitoring movement along the vaginal canal, wherein the internal unit further comprises a flexible tail attached to the opposite distal end of the internal unit for withdrawal of the internal unit from the vaginal canal.