HOW THE VGRF CHANGES WITH THE CHANGES OF THE CLUBS IN GOLF SWING

Abstract

It is assumed that the ground forces would be different according to the club used because the length and swing weight of each club is different. This study focused on the investigation of the changes of the vertical ground reaction forces (VGRF) by the change of the club length. The subjects were three professional male golfers. Four clubs swing (driver, iron 3, iron 5, and iron 7) for each subject were taken by two high speed video cameras. Two AMTI force platforms were used to measure the VGRF simultaneously. Maximum VGRF was occurred at the club horizontal position in the downswing for the left foot. The shorter club produced more maximum forces than longer ones in the left foot, but reverse were true for the right foot. Maximum VGRF at impact shows the same patterns.