An apparatus for the strengthening and rebuilding of the muscles of the pelvic floor includes a center generally flat main resistance spring that includes a generally U-shape. The main resistance spring supplies a force which urges separation between a first end and an opposite second end of the main resistance spring. A surrounding case provides a stop mechanism to limit further separation of the first end with respect to the second end. A secondary resistance spring is attached to an interior of the main resistance spring and is used to supply an increase in overall resistance as well as to actuate an optional mechanical counter. An optional pair of auxiliary resistance bands are provided and are urged within a longitudinal channel to vary the magnitude of overall resistance. An optional handle is included to aid in transportation.