• 한국운동역학회지
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• 제16권2호
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• pp.97-108
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• 2006

C. H. OH, S. N. CHOI, T. G. NAM, The Kinematic Analysis of the Tennis Flat Serve Motion, Korean Jiurnal of Sports Biomechanics, Vol. 16, No. 2, pp. 97-108, 2006. By the comparison and the analysis of the different factors during the tennis flat serve motion such as the required time per section, the movement displacement of the racket, the velocity of the upper limbs joints, the physical center of gravity, and the angle and the angular velocity of the upper limbs joints between an ace player and a mediocre player, these following results were drawn. First, the experiment result of the total time required per section in a tennis flat serve motion showed that an ace player was faster than a mediocre player by 0.4 seconds. This result suggested that it was required to increase the speed of the racket head by a swift swing to perform an effective flat serve motion. Second, the experiment result of the movement displacement of the racket in the tennis flat serve motion showed that an ace player greatly moved toward the left side on an x-axis. But both an ace and a mediocre player were shown to be at the similar points on a y-axis at the moment of the impact of the racket. An ace player was also shown to be located at a higher position on a z-axis by 0.23m. Third, the velocity of the center of gravity of an ace player was faster in every phase than that of a mediocre player in a tennis flat serve motion. Fourth, the velocity of the upper limb joints of an ace player was faster in every phase than that of a mediocre player in a tennis flat serve motion. Fifth, the experiment result of the speed of the racket head in tennis flat serve motion showed that a mediocre player was faster than an ace player in the first phase, but the latter was faster than the former in the second, third, and the fourth phases. Sixth, at the moment of impact of a tennis flat serve, an ace player had greater flexion of the angle of the wrist joints by an 11.8 degree than a mediocre player. An ace player also had greater extension of the angle of the elbow joint and the shoulder joint respectively by a 5.2 degree and a 1.4 degree with a mediocre player. Seventh, an ace player had greater angular velocity of the upper limb joints and the hip joints than a mediocre player at the moment of the impact of tennis flat serve. Eighth, an ace player was shown to have a greater change of the forward and the backward inclination (or the anterior and posterior inclination) of the upper body

• 대한관절경학회지
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• 제13권2호
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• pp.155-160
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• 2009

목적: 관절경하 회전근 개 봉합술 후 파열 정도에 따른 통증 회복의 양상과 경과에 영향을 미치는 인자에 대해 조사하였다. 대상 및 방법: 2006년 1월부터 2008년 4월까지 관절경하 회전근 개 봉합술을 시행받은 153명의 환자를 대상으로 하였으며, 평균 연령은 56.4(39~70)세 였다. 수술 후 추시 기간은 평균 20개월(12~30개월)이었으며, 견관절 운동 범위와 임상적 기능적 평가로써 ASES(American Shoulder and Elbow Surgeons) 점수, UCLA(University of California at Los Angeles) 견관절 평가 지수를 이용하였다. 통증에 대한 평가는 주관적 시각 척도를 이용하였다. 파열 정도에 따른 통증 회복 양상은 전층 파열군과 부분 파열군으로 분류하여 Student T-test를 이용하였고, 통증에 미치는 인자는 다중 회귀 분석을 이용하여 통계분석을 시행하였다. 결과: 술 후 주관적 시각 척도(Visual Analogue Scale, VAS)는 파열 정도에 따라 의미있는 차이는 보이지 않았으며, 두 군 모두 지속적 감소 추세를 보였으나, 술 후 3주째에 평균값이 상승한 후 하강하였고, 7주째에 평균값이 다시 상승한 후 하강하였다. 주관적 시각 척도가 2이하가 될 때는 술 후 평균 3개월이었다. 술 후 3개월에 통증에 영향을 주는 요소는 술 전 전방 굴곡과 의미있는 관계가 있었다($r^2=0.377$, p=0.021). 결론: 파열 정도에 따른 통증 회복 경과의 차이는 보이지 않으며, 술 전 견관절 전방 굴곡의 운동범위가 술 후 통증의 정도에 영향을 미치는 것으로 사료된다, 따라서 술 전 견관절 운동 범위를 향상시킬 수 있는 적절한 재활 지침이 술 후 빠른 통증 감소와 기능 회복에 도움을 줄 수 있을 것으로 사료된다.

• 대한정형외과학회지
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• 제55권1호
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• pp.46-53
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• 2020

목적: 전위가 있는 견갑골 체부 골절에서 외측 후방 금속판을 이용한 내고정술 시행 후 방사선적 및 기능적 치료 결과를 보고하고자 한다. 대상 및 방법: 2007년 3월부터 2017년 5월까지 견갑골 골절로 수술을 받은 40명의 환자 중 견갑골 체부 골절에 대해 외측 후방 금속판 고정을 사용한 13예의 환자를 후향적으로 연구하였다. 수술 전과 수술 후 골편 전위, 각 형성 및 관절와-극간각을 측정하였고, 마지막 추시 시 관절운동 범위와 시각통증점수(visual analogue scale, VAS), disabilities of the arm, shoulder, and hand(DASH) 및 Constant 점수를 평가하였다. 결과: 평균 추시 기간은 17.7개월(범위, 6-45개월)이었고, 견갑와-극간각은 수술 전 평균 23.3°±3.96° (범위, 17.8°-28.1°)에서 수술 후 평균 31.1°±4.75° (범위, 22.5°-40.1°)로 측정되었다. 수술 후 신경 및 혈관 손상, 불유합, 골절 전위, 내고정물 파손, 감염은 일어나지 않았다. 마지막 추시 시 관절운동 범위는 전방 거상 평균 150.5°±19.3°, 외전 평균 146.6°±23.4°, 외회전 평균 66.6°±19.1°, 내회전 평균 61.6°±18.9°로 측정되었으며 VAS는 1.7±1.3점, DASH 점수는 6.2±2.4점, Constant 점수는 86±7.9점으로 측정되었다. 결론: 심한 골절의 전위, 각 형성 및 관절와-극간각의 감소가 뚜렷한 견갑골 체부 골절에서 외측 후방 금속판 고정은 적절한 수술 술기를 통해 골절의 정복 및 안정된 고정이 가능하고 방사선 사진상 만족스러운 골유합 및 방사선 지표의 호전과 양호한 기능적 결과를 얻을 수 있다.

• 한국운동역학회지
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• 제15권3호
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• pp.21-30
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• 2005

The purpose of this study is helps to make full use for perfect performance by grasping the defects of Tichonkich motion performed by athlete CSM For this, the study analyzed kinematical variables through Tichonkich motions performed at the first selection competition(1st trial) and final selection competition(2nd trial) for the dispatch to the 28th Athens Olympic Games using the three-dimensional cinematographical method with a high-speed video camera, and obtained the following results. 1. During Tichonkich motion, the execution time of up swing and the right hand moving to the left bar was shorter in the 2nd trial than the 1st one, while the execution time of down swing, the support of the left bar and the right hand moving to the right bar was longer in the 2nd trial than the 1st trial. 2. The horizontal position of COG in the 2nd trial was -35cm in the 1st stage, 42cm in the 3rd stage and 29cm in the 4th stage, that is, it showed a great swing focused on the circular movement compared to the 1st trial, while the vertical position of COG was -59cm in the 2nd stage, that is, it showed a small swing focused on a up and down movement. Also the 5th stage vertical position was 98cm, and the 6th stage vertical position was 95cm in the 2nd trial which were higher than those of the 1st trial, so it has provided magnificence required in the modern gymnastics. 3. And it was indicated that the horizontal velocity at the down swing phase proceeded forward more rapidly in the 2nd trial than that in the 1st trial, and the reverse ascent made a rapid vertical rise lessening left and right velocity change. And in the 5th stage, the 2nd trial was kept very slower in horizontal, vertical and left and right velocity that in the 1st trial, so it reached a handstand with leisurely movement. 4. In the 2nd trial, shoulder joint of the 1st, 2nd, 3rd stages kept a larger angle than that in the 1st trial, that is, it made a great swing while in the 1st trial, it showed a swing movement dependent on kick movement by the flexion and extension of hip joint. Also in the 2nd trial, the body formed a vertical posture with both hands supporting the left bar and hip joint was kept larger as $198^{\circ}$ and $190^{\circ}$ in the 5th and 6th stage than that in the 1st trial, so it made a handstand with the body uprightly stretched out, and magnificent and stable movement.