A resistance swing training apparatus and method for providing resistance opposing the rotation of the hips of athletes performing sports-specific movements such as the golf or baseball swing. The apparatus provides the resistance by attaching tethers such elastic cords to a harness worn around the waist of the athlete in a configuration that allows the athlete to perform the sports-specific movement at optimum speed. In one embodiment the apparatus includes a base forming the training area and a pair of training modules for providing the elastic cords for attachment to the hips of the athlete. The lateral spacing and elevation of the elastic cords may be adjusted to fit the athlete. The resistance may also be adjusted in a wide range of resistances to fit the athlete.