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드라이버 스윙 시 X-Factor, X-Factor Stretch와 스윙 관련 변인의 상관관계 분석
이경헌 ( Kyung Hun Lee ),권문석 ( Moon Seok Kwon ),임영태 ( Young Tae Lim ) 한국운동역학회 2015 한국운동역학회지 Vol.25 No.2
Purpose: Recently, many researchers and golf coachers demonstrated that X-factor and X-factor stretch had a co-relationship with driving distance. However, its relationship is still controversial and ambiguous. Thus, the aim of this study was to examine the relationship among X-factor, X-factor stretch and swing-related factors, including driving distance in elite golfers. Method: Seventeen male elite golfers (handicap: ≤4) with no history of musculo-skeletal injuries participated in the study. Thirty spherical retro-reflective markers were placed on including the middle point of PSIS, the right/left ASIS, the right/left lateral acromion of the scapula, driver head and shaft grip. All motion capture data was collected at 100Hz using 6 infrared cameras. Carry distance, club speed, ball speed, smash factor, launch angle, and spin rate were collected from radar-based device, TrackMan. Results: Pearson’s correlation coefficient method was used to find the correlations among X-factor, X-factor stretch and swing-related factors. Positive correlations between driving distance and other swing-related factors which include club speed(r=.798, p<.001), and ball speed(r=.948, p<.001) were observed. In contrast to the swing-related factors, X-factor and X-factor stretch had no relationship to driving distance. Conclusion: These results indicate that X-factor and X-factor stretch are not key regulators in driving distance.