골프의 스윙동작의 숙련자와 비숙련자의 비교연구
A comparative study on the swing action of the experienced and unexprienced in golf = in point of down swing
iv, 48, 5 p.
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The purpose of this study is to compare and analyze three-dimensionally the factors of movemental variation in driver swinging positions between pro-golfers and amateurs and to show the athletical theories upon it. The conclusion of such theme through research and discussions is as follows: 1. For golf-swing time, although the whole swing takes the same length of time between the pro-golfer and the amateur, the pro-golfer takes less time from the uncocking to the impact, and thus it tells that pro-golfers are speedier than amateurs in swinging. 2. At the rotation angle of hip twist in swinging,pro has 102.53˚ rotation angle and amateur has 83.53˚ rotation angle. This shows pros twist larger of their lower bodies. 3. Left shoulder angle at the impact has the skilled 90.83±15.01˚ and the unskilled 55.90±4.55˚. 4. In trunk rotation angle,it shows little difference between two. 5. In cocking pro keeps smaller angle as swinging. 6. Pro gets smaller shaft angle than amateur, which is regarded as relativity between the rotation angle of hip twist and the cocking angle. 7. In down swing amateur is narrowing left thigh angle and pro is widening it. It applies the unskilled is doing the knee-joint inside exercise and the skilled outside exercise. 8. Right thigh angle does pro vary more from the down swing to the impact. 9. In the speed of left knee movements pro shows fastest as uncocking, but amateur as in the impact. 10. With club head's speed, pro goes up the most as from the uncocking to the impact while down swinging.