Abstract: An apparatus for use in training proper swing mechanics, for use in connection with golf, baseball, tennis, or similar sports. The device includes a sheath, which has an cushion member attached to a concave inner surface for user comfort. The apparatus is releasably attachable to a user's legs or hips by a pair of straps incorporating hook and loop fastening material, and includes a projecting rigid support member extending normal to the sheath outer surface with a weight member having a soft outer shell and suspended therefrom by a flexible cord; a clip device allows for adjustment of the cord length for suspending the weight member at a user selected position. The weight member includes access means for enabling user to add mass to, or subtract mass from, the suspended weight. The position and movement of the suspended weight member provides the user with feedback relative to numerous body positions and movements for teaching the user proper swing or body movement mechanics.