A device (20) and method for training a golfer's swing by synchronizing the movements of their club (40) to prompts produced by a microprocessor (48) that has been scientifically programmed with the tempo of the Tour Pros. Once it has been determined what the optimum tempo for that particular golfer is, then fitting the golfer to a shaft (36) that has the proper matrix development to complement the optimum flexing and straightening of the shaft to the golfer's tempo. The device (20) is also programmed for use with putting and short game tempos, which are different than those used for full shots.