Abstract: An apparatus for teaching and diagnosing a golf swing includes first and second hand grips and a coupling device which holds the hand grips parallel to each other while allowing them a single degree of movement, toward or away from each other between innermost and outermost positions. The coupling device may be a pair of pistons having piston shafts coupled to the first hand grip and piston cylinders coupled to the second hand grip. Alternatively, the coupling device may be a pair of shafts having first ends fixedly coupled to the first hand grip and being slidably coupled to the second hand grip. When the hand grips move into the innermost and outermost positions, audible sounds are produced. The hand grips may include grip shafts coupled to the coupling device and handles either fixedly or rotatably disposed about the grip shafts.