야구 타격시 숙련자와 미숙련자의 족저압력 분석 = Plantar Pressure in Skilled and Unskilled Players during Baseball Batting

다국어 초록 (Multilingual Abstract)

This study examined 24 right-handed amateur baseball players. Twelve who had played baseball for more than 6 years were grouped as skilled players, while 12 who had played for 1-3 years were the unskilled player group. The swing motion was divided into four event phases: stance, backswing, impact, and follow-through. The mean and maximum plantar pressure, center of pressure, and ground reaction force were measured during each event phase. The mean and standard deviations for each variables were calculated and differences were validated with the independent sample t-test. A p-value <0.05 was considered statistically significant. The results were as follows. 1)The ideal stance is a stable, balanced position with more than 65% of weight on the right foot. There was significant difference in mean left plantar pressure, while the maximal plantar pressure and mean right plantar pressure did not differ significant. 2)The effective backswing of a skilled player is comprised a rightward shift in weight to build maximum energy. More than 90% of the weight was on the right foot. There was a significant difference in the mean left plantar pressure, while the maximal plantar pressure and mean right plantar pressure did not differ significantly. 3) For an effective impact, a rapid shift in weight to the left foot is essential, so that a power hit is obtained. Significant difference in the mean and maximum plantar pressures of both feet were observed. 4)Follow-through requires wight balance, more on the right than the left, without leaning leftward. There was no significant difference in the mean or maximum plantar pressure. 5)The center of plantar pressure should move from the center of the foot to the toe. 6)The analyses of the ground reaction force suggest that a good swing involves a gradual shift in weight to the right side and a rapid leftward shift at impact. Good balance, with the center of gravity on the right side at follow-through, is also required.

참고문헌 (Reference)

1 백진호, "우수 소프트볼 선수 타격동작의 운동학적 분석" 한국체육학회 47 (47): 563-572, 2008

2 남기정, "야구 배트 속도에 대한 상지 분절의 기여도 연구" 한국사회체육학회 29 (29): 351-361, 2007

3 박승범, "등산화의 기능성 평가를 위한 족저압력분석" 한국운동역학회 17 (17): 191-200, 2007

4 Breen, J. L., "What make a good hitter?. Journal of Health" 38 (38): 36-39, 1967

5 Shapiro, R., "Three dimensional kinetic analysis of baseball swing" University of Illinois at Urban-Champaign 1979

6 Flyger, N., "The science of softball" 36 (36): 797-816, 2006

7 Baek N. J., "The path of center of pressure(COP)of the foot during walking" 21 (21): 762-771, 1997

8 Messier, S. P., "The mechanics of batting: analysis of ground reaction forces selected lower extremity kinematics" 53 (53): 206-213, 1985

9 Sin, Y. S., "The kinetic relation between the golf swing and the length of the drivers" Graduate School of Yonsei University 1999

10 Hay, J. G., "The biomechanics of sports techniques" Prentics-hall 190-200, 1973

11 Hay, J. G., "The biomechanics of sport" Prentice-Hall 1993

12 Bae, W. H., "Study of biomechanical factors affecting the ball velocity and the ball control during overarm pitch in baseball" Graduate School of Kyungpook National University 1992

13 Kinoshita, H., "Strain response and breakage in wooden baseball bats from batting" Biomechanics ¢°-B, Free University Press 798-803, 1988

14 Moon, W. H, "Plantar pressure in skilled and unskilled players during baseball batting" Graduate School of Silla University 2012

15 Son, D. J, "Plantar foot pressure analysis during golf swing motion in slope" Graduate School of Silla University 2009

16 Bubalo, M., "Nine major checkpoints in the swing" 50 (50): 91-95, 1981

17 Murphy, G., "Hitting mechanics from stance to follow through" 60 (60): 28-30, 1991

18 Kevin, G. L., "Functional hip characteristics of baseball pitchers and position players" 38 (38): 383-387, 2010

19 Lee, Y. S., "Comparative study of the baseball batting patterns between skilled and unskilled players" Graduate School of Seoul National University 2003

20 Hirano, Y., "Biomechanical analysis of baseball hitting. Biomechanics in Sport •ð & •Š" 21-28, 1987

21 Kim, S. H., "Biomechanical analysis according to the Stance type on the batting movement of baseball players" Graduate School of Dankook University 2010

22 Park, J. M., "Analysis on plantar pressure between amateur and professional golf players in putting action" Graduate School of Silla University 2009

23 Kim, S. Y., "Analysis of kinematic in Baseball pitching motion. Level 1 Coaches Field Application report" 2008

24 Jo, B. H., "A study on the ground reaction force during baseball batting" 15 (15): 532-533, 1993

25 Oh, Y. D., "A Study of the changes of plantar foot pressure and weight transfer during golf swing" Graduate School of Pukyong National University 2008

26 Yu, J. C., "A Study of the changes of plantar foot pressure and weight transfer during Golf Swing" Graduate School of Kookmin University 1992

27 Kim, M. Y., "3-dimensional cinematic analysis for the simplified movement of golf swing" Graduate School of Chonnam University 1999

28 천영진, "15주 야구 수업을 통한 던지기 동작의 운동학적 변인 변화 분석" 한국운동역학회 22 (22): 1-7, 2012