Abstract: A data acquisition and display system 60 obtains a golfer's downswing parameters during a swing analysis examination. The system 60 includes a specialized golf club 62 which generates data when swung in a downswing motion for a period of time defined as a downswing period which terminates upon impact by a club head 68 with a golf ball 56. As the club 62 is swung by a golfer whose swing is being analyzed, the club deflects in certain directions relating to toe up or toe down conditions, and leading or lagging conditions, of the head 68 of the club. The system 60, through hardware and software, responds to these downswing conditions and determines various performance parameters associated with the swing analysis of the golfer. The parameters are displayed on a monitor 94 and are used to form a graph 126 showing instantaneous deflection levels during the downswing period. The displayed parameters and the graph 126 can be printed by a printer 118.