Abstract: The force plate data acquisition system measures, processes and analyzes the vertical reaction forces and various weight shifts between the ground and a golfer's feet during a swing. Plates are supported on cantilever beams through ball bearings. The beams are attached to a rigid frame and instrumented with strain gauges configured in a Wheatstone half bridge arrangement. An eight-channel strain gauge data acquisition board in a central processing unit records strain information. Data collection can be independent or controlled by a motion analysis system to provide synchronous foot force and video information. A set of BASIC programs collect strain readings from the foot plates, process the data, relate beam deflections to applied load and plots reaction force and weight shift information to the computer screen. Graphs produced are total vertical reaction force, foot-to-foot weight shift, heel-to-toe weight shift, outside-to-instep weight shift and the speeds of each.