Abstract: A golfer's training device (10) weighing in the range of three to four pounds includes an upper body portion (11) and a lower body portion (12). The body portions are attached at one end by a hinge member (13) and internally define a cavity (14) corresponding to the configuration at the grip area (15) of a golf club (16). The two body portions (11, 12) are closed onto the grip end (15) of the golf club (16) and secured by a hook latch (19). The increased weight on the grip end (15) of the golf club (16) changes the center of gravity of the club (16) to a point closer to the grip end (15) than with a normal club. The increased weight on the grip end (15) helps slow down the golf swing, which allows the golfer to analyze the swing and make corrections while exerting the same muscle force as if making a normal swing. Thus the corrected swing becomes a learned muscle behavior and a reflexive action.