抄録
The excursion patterns on center of pressure (COP) during golf swing are recognized into two types in skilled golf players. These are named "Front foot" and "Reverse" styles. In front foot style players, their COP travels smoothly from the back to front foot. While, in reverse style players, their COP showed similar excursion patterns to front foot style from backswing to early downswing, but it abruptly traveled to the backward just before the impact of ball hitting. It has never known which styles were beneficial for better performance especially repeatability of golf swing. The purpose of this study was to investigate the reproducibility of excursion patterns on COP during golf swing. Thirty nine skilled golfers (male = 22; female = 17) were participated in this study. They performed 10 driver shots with their maximum efforts. The locations of COP in medio-lateral and anterio-posterio directions (COPx, COPy) were calculated with ground reaction force. The reproducibility of the excursion pattern on COPx and COPy during golf swing was evaluated by coefficient of variation, which was the variation in COP at ball contact. There were two excursion patterns on COP in the subjects of this study and classified 21 players as front foot style and 13 players as reverse style. The coefficient of variation of COPy for front foot style golfers was significantly larger than that of reverse style golfers. These results indicated that the reproducibility of excursion pattern on COPy for Reverse style golfer was lower than for Front foot style golfer.
