Described herein is an athletic training device to aid a user in hip rotation, specifically to help the user increase the strength and speed of the rotation motion of his or her hips for improving performance in sports activities. The present invention is a device to be worn by a user as an athletic training or exercising aid, or a therapeutic aid, helping the user to maintain proper body alignment during a specific body movement involving the hips. In one embodiment, the device comprises a base from which extends an arm, the arm attached to the base by a pivot or hinge point, that allows the arm to move along a linear arc when force is applied to the device, such as the force exerted by a user upon rotation of the hip.