An apparatus for improving a golf swing that comprises a telescopic arm link shaft connected between a golfer's upper arm and the grip of a golf club held in the golfer's hands. The arcuate grip attachment member of the apparatus is easily held against the golf club grip by the golfer's hands. The shaft-to-grip connection pivots, while the shaft-to-arm-attachment-member connection provides swiveling movement. The arm attachment member can also be adjusted around the golfer's upper arm to provide a comfortable but non-slip connection. A stop on telescopic arm link shaft further allows the golfer to adjust the maximum amount of angle change desired during a golf swing. Thus, angle and rotational changes for the golfer's lower arm are permitted, while absolute alignment of the golfer's upper and lower arms to the golf club is maintained throughout the golf swing. Applications can include any sports implement used with a swinging motion.