The Korean Journal of Physical Education (한국체육학회지)

Korean Alliance for Health: Physical Education: Recreation:and Dance (한국체육학회)
권호 표지

골프 스윙 동작시 허리부상 경험선수와 정상선수간의 요추 부하 비교 분석

Lim, Young-Tae;Shin, In-Sik
임영태;신인식

  • Published : 20020000
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Abstract

This study estimated the lumbar spinal loads at L4-L5 level during a golf swing using musculoskeletal modeling techniques and compared the spinal loads of injured and non-injured golf players. Data were collected from two experienced amateur golfers. Four digital camcorders and two force plates were used to obtain the 3-D kinetics and kin antics of the golfers motion and 8 pairs of surface electrodes were used to record the activity of selected lower trunk muscles. Eight reflective markers located on the back of the subject were used to estimate the orientations of the middle and lower trunks and musculoskeletal parameters of the trunk Initially, lower trunk muscle forces were estimated using an EMG-based muscle model. An EMG-assisted optimization model was then applied to modify the initial muscle forces using optimized gains for individual muscles to meet the L4-L5 joint resultant moment equilibrium condition. The lumbar spinal loads acting on the L4-L5 motion segment were estimated using the computed muscle forces and joint resultant force at L5. The results demonstrated that the L4-L5 motion segment of non-injured player was subjected to nine peak compressive and antero-posterior (A/P) shear loads than those of injured one during a golf swing. However, the peak medio-lateral (M/L) shear load of injured player were approximately three times higher than that of ran-injured one. Particularly, the timing that occurred the peak compressive load of injured player was very different faun the corresponding value of non injured one. These results suggest that early occurrence of peak compressive load and high M/L shear load of injured player are closely correlated with the risk of back injury.

Keywords

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