Abstract: A resistance exerciser for the vaginal muscles having a first member, a second member, an adjustment and locking apparatus and a system to provide bias. The first member and second member are joined together at a rear ends of both members by a hinge to form the overall unit. Bias is provided between the members to bias the members from a closed position to an open position. The adjustment and locking apparatus controls the opening width between the first and second members and is used to maintain the exerciser in a closed position for insertion and storage.The first member has a tapered head region for ease of insertion into the orifice of the vagina. The second member is joined with the first member from just behind the head region and extends to the rear of both the first and second members where they are attached with a hinge. Just behind the head region is a muscle positioning region consisting of an abrupt inward tapering, a flattened portion and an abrupt outward tapering.