• 한국산학기술학회논문지
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• 제12권9호
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• pp.4054-4060
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• 2011

본 연구의 목적은 투척선수들의 지도자 신뢰가 선수만족 및 인지된 경기력에 미치는 영향을 규명하는 것이다. 연구 대상은 2011년 4월21일부터 25일까지 5일간 개최된 제40회 전국종별육상선수권에 참가한 고등부, 대학부, 일반부 남 여 육상투척선수 198명이었다. 수집된 자료는 분석 목적에 따라 사례별로 분리 입력하였다. 지도자와 선수의 신뢰가 선수만족 및 인지된 경기력에 미치는 영향을 분석하기 위하여 SPSS 18.0 프로그램으로 각 변인별 상관관계 분석 및 다중회귀분석(multiple regression)을 실시하였다. 첫째, 투척선수들의 지도자 신뢰는 선수만족에 의미 있는 영향을 미친다. 즉, 지도자 신뢰의 하위요인인 성실성, 능력, 일관성, 이타성, 개방성은 선수만족의 하위요인인 기술분석, 지도능력, 코치자질에 유의한 영향을 주었다. 둘째. 투척선수들의 지도자신뢰는 인지된 경기력에 의미 있는 영향을 미친다. 즉, 지도자 신뢰의 하위요인인 성실성, 능력, 일관성, 이타성, 개방성은 인지된 경기력의 하위요인인 승리의지, 기량발휘에 의미 있는 영향을 미치는 것으로 나타났다. 이러한 결과로 볼 때, 투척선수들의 지도자신뢰는 선수만족은 물론 인지된 경기력에 유의미한 영향을 미친다고 할 수 있다.

• 한국운동역학회지
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• 제19권4호
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• pp.707-717
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• 2009

본 연구의 목적은 여자 창던지기 선수를 대상으로 지지발 착지와 릴리즈 국면 시 우수 집단과 준우수 집단 간의 운동학적 차이를 규명하는데 있다. 이를 위해 국내 여자선수 8명을 대상으로 측정 최고기록이 45m이상인 선수를 우수 집단으로, 45m이하를 준우수 집단으로 구분하였다. 창의 투사속도에 있어서 릴리즈 단계의 수직속도는 집단 간에 통계적인 차이를 보이지 않았지만, 수평속도는 집단 간에 유의한 차이(p<05)가 있는 것으로 나타났고, 릴리즈 순간의 투사각에 있어서 우수 집단은 평균 36.3도를 보였고, 준우수 집단은 평균 42.3도를 보이면서 집단 간에 유의한 차이(p<.05)가 있는 것으로 나타났다. 지지다리 무릎각에 있어서는 힘 발 착지(우수>준우수)와 지지발 착지(우수<준우수) 그리고 완전착지(우수<준우수)에서 집단 간에 유의한 차이(p<.05)가 있는 것으로 나타났지만, 릴리즈 순간에 있어서는 유의한 차이를 보이지 않았다. 어깨각에 있어서도 힘 발 착지에서만 유의한 차이(p<.05)를 보였고, 릴리즈 단계에 있어서는 유의한 차이를 보이지 않았다.

• BMB Reports
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• 제42권9호
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• pp.605-610
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• 2009

Plasma high-density lipoprotein cholesterol (HDL-C) levels are inversely correlated with the risk of cardiovascular disease, and are known to increase with repetitive exercise. In the current study, HDL fractions from athletes' sera were isolated and compared as a function of the type of sport (runners [n = 10], throwers [n = 10], wrestlers [n = 10], and weight lifters [n = 8]), and as an age- and gender-matched reference group (n = 14). Among athletes, HDL from runners had the strongest antioxidant activity. Immunodetection showed that runners and wrestlers had the highest levels of apoA-I and lowest levels of apoA-II in their HDL. Electron microscopy also revealed that HDL2 of runners and wrestlers were the largest in size. In conclusion, although all athlete groups had significantly better serum lipid/lipoprotein profiles than the reference group, runners and wrestlers had the most desirable lipoprotein function and structure, including antioxidant activity, HDL-associated enzyme activities and increased particle size.

• 한국운동역학회지
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• 제14권1호
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• pp.51-63
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• 2004

The purpose of this study was to investigate a three dimensional kinematic variables about the last stride and the release phase of the throwing technique for female javelin throwers. For the motion analysis, Six female javelin throwers were used as subjects. Three-dimensional coordinates were collected using the Kwon3D Motion Analysis Package Version 2.1 Program. Two S-VHS Video Cameras were used to record the locations and orientations of control object and the performances of the subjects at a frequency of 6.0 HZ. After the kinematic variables such as the time, the distance, the velocity, and the angle were analyzed about the last stride and release phase, the followings were achieved; 1. For the effectively javelin throwing, the subjects appeared to do long the approach time in the phasel of landing phase, and short the delivery time in release phase 2. In the release event, the other subjects except for subject A appeared to throwing in the lower condition than the height of themselves. This result showed to slow the projecion velocity. 3. For increase the projection vcelocity of the upper extremity joint in the release event, it appeared to do extend rather the shoulder angle than increase the extension of elbow joint. 4. The body of COG angle showed to gradually increase nearly at the vertical axis in the release event. But the front lean angle of trunk showed a small angle compare to increase of the body of COG angle. Therefore for the effectively momentum transmission of the whole body in the javelin, the front and back lean angle of trunk appeared to do fastly transfer the angle displacement in the arch posture or the crescent condition during the deliverly motion of the release phase.

• 한국운동역학회지
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• 제22권2호
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• pp.131-140
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• 2012

This study was to investigate the relationship between the distance and projection factors, angle factors of javelin in women's javelin throwing. The data were collected in the 2011 National Sports Festivals for 11 players. Three-Dimensional motion analysis using a system of 4 video cameras at a sampling frequency of 60 fields/s was performed for this study. The factors of release conditions calculated using Matlab 2009a program. The statical analysis on the records(n=42) included mean and standard deviation of the mean(SD), Pearson's product moment correlation coefficient(SPSS Version 16.0 for Windows). There was a statistically significant positive relationship between the records and release velocity(r=.866, p<.01), height(r=.433, p<.01) and height rate(r=.340, p<.05). The attitude angle, release angle, and attack angle showed not a statistically significant relationship between the records. The medial-lateral tilt angle of javelin showed not a statistically significant relationship between the records, but the yaw angle of javelin(r=.549, p<.01) showed a statistically significant positive relationship between the records.

• 한국운동역학회지
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• 제23권1호
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• pp.1-9
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• 2013

The purpose of this study was to provide information on athletes' characteristics and advantages and disadvantages by analyzing the kinematic factors having a decisive influence on competitive abilities such as release conditions in the delivery phase on major Korean javelin athletes. Two supported javelin throwers of the Korean national team participated in this study. The total average time required of the delivery phase was 0.31(${\pm}0.016$). The athletes' release angle was 33.2 to 41.7 degrees. The attack angle varied widely from -3.5 to 5.9 degrees. The Javelin heights of Subject A and B were 95.9 and 89.2%Ht. The average stride length were 180.6 and 176.7cm. The center of mass velocity of LFD and REL was relatively low in all the subjects. The average deceleration rates of center of mass velocity of Subject A and B were 57.2 and 48.9%lose. The left knee angles of Subject A and B were 160.1 and 155.5 degrees in LFD, 153.0 and 164.0 degrees in REL. The joint velocity of upper limb segments was relatively low in all the subjects. The maximum average wrist velocity of Subject A and B was 18.2 and 16.3 m/s in REL.

• 한국산학기술학회논문지
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• 제12권3호
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• pp.1128-1135
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• 2011

본 연구는 육상 투척 선수들의 자기관리와 심리적 행복감의 관계를 실증적으로 규명하기 위한 것으로 연구의 대상자는 대한육상경기연맹에 등록된 고등부, 대학, 일반실업 육상투척선수로서 제91회 전국체전 대회에 출전한 고등부, 대학, 일반실업 선수(남:82, 여:102)로서 총 184명을 대상으로 조사하였다. 수집된 자료를 분석하기 위해 변량분석(ANOVA)과 중다회귀분석(multiple regression)을 실시한 결과 다음과 같은 결론을 얻었다. 첫째, 투척선수들의 사회인구학적 특성에 따른 자기관리 및 심리적 행복감에는 차이가 없는 것으로 나타났다. 둘째, 투척종목 선수들의 자기관리와 심리적 행복감에는 유의한 인과관계가 있는 것으로 나타났다. 즉, 자기관리는 심리적 행복감에 유의미한 영향을 미치는 것으로 나타났다. 이상의 결과을 종합해 볼 때, 이 연구에서는 육상경기 중 투척경기의 선수들의 사회 인구학적 특성에 따른 자기관리와 심리적 행복감에는 차이가 없고, 자기관리는 심리적 행복감에 긍정적인 영향을 미치는 것으로 나타났다. 따라서 선수들의 심리적 행복감을 통한 최적의 경기수행을 이끌어 내기 위해 철저한 자기관리를 위한 프로그램을 제공해야 한다는 종합적인 결론을 제시할 수 있다.

• 한국운동역학회지
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• 제21권5호
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• pp.661-667
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• 2011

The purpose of the study was to compare selected kinematic variables between the female medalists and a Korean female javelin thrower at the IAAF World Championships, Daegu 2011. Three medalists and one Korean javelin thrower that participated in the Championships were videotaped using three high-speed cameras (300 frames/s, EX-F1 Exilim, Casio, Japan). This study identified the performance differences between the two groups. The results showed that the Korean female javelin thrower (KFJT) clearly had a greater delivery phase time than the female medalists. In order to throw farther, a thrower must exert a greater force to accelerate their body in a short time. This study also found that the release velocity of the KFJT was lower than that of the female medalists. The KFJT showed evidence of using her extremities differently to achieve the maximum release velocity. When comparing the inclination angle of the trunk across javelin throwers, the lowest value was recorded in the KFJT. Because the trunk position at release plays a significant role in determining the release height and release velocity, the KFJT should not rely on her upper extremities to achieve as high a release velocity as possible.

• 한국운동역학회지
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• 제24권3호
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• pp.217-227
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• 2014

The purpose of this study was to investigate the relationship between distance and factors of javelin in korean male's javelin throwing. To accomplish this purpose, the analyzed trail selected total 29 trails (subjects 9) recorded more than 65 m in the 93rd National Sports Festival. The Kwon3D 3.1 version was used to obtain the three dimensional coordinates about the top, grip, end of javelin. And the kinematic data such as projection factors and direction angle of javelin calculated using Matlab2009a program. The statical analysis on the records (n=29) were used to Pearson's product moment correlation coefficient. There was a statistically positive relationship between the records and horizontal velocity (r=.866, ${\rho}$<.01), height (r=.541, ${\rho}$ <.001), height rate (r=.373, ${\rho}$ <.05) and horizontal displacement of javelin (r=.749, ${\rho}$ <.01), but the medial/lateral velocity showed a negative relationship to r=-.663 (${\rho}$ <.01). The attack and yaw angle showed not a significant relationship between the records, but the medial-lateral tilt (E1:r =-.557 [p<.01)] E2:r=-.629 [${\rho}$<.01], E3:r=-.528 [${\rho}$ <.01]) and attitude angle (E2:r=-.629 [[${\rho}$<.01], E3:r=-.619 [${\rho}$ <.01]) of javelin showed a negative relationship between the records, as well as the projection angle of javelin (r=-.419, ${\rho}$ <.05) showed a negative relationship between the records.

• 한국운동역학회지
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• 제23권2호
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• pp.99-108
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• 2013

The purpose of this study was to analyze the kinematic characteristics of javelin to compare the characteristics between world elite athletes and local male athletes. The subjects selected 9 athletes out of total 13 athletes recorded more than 65 m in the preliminary and main competition participated in the 93rd National Sports Festival held in 2012. Three-Dimensional motion analysis using a system of 4 video cameras(Sony HXR-MC2000) at a sampling frequency of 60 fields/s was performed for this study. The Kwon3D 3.1 was used to obtain the three dimensional coordinates about the top, grip, end of javelin. And the kinematic factors of javelin calculated using Matlab2009a program. The resultant speed of javelin that affects directly to the record of performance showed 26.08 m/s indicated lower speed of about 2-3 m/s than world elite athletes. The release point appeared to have been made at the high of $1.79{\pm}0.07$ m of 99.8% of the height of the athletes. In terms of release angle, it was indicated average $33.0{\pm}3.81^{\circ}$ lower release angle compared to the world elite athletes. The attitude angle(up & down tilt angle, X axis) related to javelin indicated average $38.5{\pm}4.96^{\circ}$, its related attack angle average $5.5{\pm}5.11^{\circ}$, and yaw angle(sideslip, side attack angle) average $15.7{\pm}8.48^{\circ}$.