A device and method are provided for training a person to swing a bat or club while rotating the person's hips. The device includes a belt for attaching around a person's hips, a restraint device attached to the back side of the belt, and an anchor system slidably attached to the restraint device. The restraint device can be a nylon strap sewn to the back side of the belt. The anchor system comprises a flexible member, such as a rope, with a first ring attached at one end for slidable attachment to the restraint device. The other end of the anchor system can be tethered to a stationary object or held by a coach. A clip can be attached to the restraint device for limiting the extent of movement of the anchor system along the restraint device and for providing a reference point for swing training.