• 제목/요약/키워드: Volleyball player

검색결과 15건 처리시간 0.021초

여자 배구와 탁구선수의 등속성 운동에 따른 무릎근력 비교 (Comparison of Isokinetic Muscular Strength of Knee according to Female Volleyball and Table Tennis Players)

  • 박시은;김용연;박신준
    • 융합정보논문지
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    • 제9권7호
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    • pp.153-158
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    • 2019
  • 본 연구의 목적은 여자 배구선수와 탁구 선수 사이에 무릎 관절의 등속성 근력 수준을 비교하는 것이다. 총 27명의 엘리트 배구 선수와 27명의 탁구 선수가 이 연구에 참여하였다. 본 연구는 등속성 근력 측정을 통해 여자 배구선수 및 탁구 선수 무릎 굽힘근 근력과 폄근 근력의 양을 측정하였다. 최대 토크는 $60^{\circ}/s$에서 3회 최대 수의적 굽힘과 폄 수축을 수행하여 측정하였다. 여자 배구 선수는 여자 탁구선수 보다 무릎 폄과 굽힘근 근력이 높았다. 탁구 선수들은 왼쪽과 오른쪽 무릎 근력에 유의한 차이가 없었다. 하지만 배구 선수들은 양쪽 무릎 근력에 차이를 보였다. 또한, 신장과 체중은 무릎 근력과 양의 상관관계를 보였다. 본 연구를 통해 여자 배구 선수는 탁구 선수보다 무릎 근력이 더욱 높은 수준에 있음을 알 수 있었다. 또한 배구 선수가 비대칭적 무릎 근력이 있음을 발견하였다. 향후 연구에서는 등속성 근력강도에 대한 연구가 다른 스포츠 선수와 비교하여 확인될 것을 기대한다.

Application of multi-physics simulation for vibration performance of the hand after contacting the ball with the volleyball player

  • Wang, Yangping;Sun, Shuze
    • Structural Engineering and Mechanics
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    • 제83권5호
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    • pp.681-692
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    • 2022
  • The vibrational response of the two bones in a Volleyball player's arm under ball impact is conducted. The two bones in hand, Ulna and Radius, are modeled as two cylindrical shells. The formulations associated with the shells' vibration are obtained using the energy method. Then, the results are extracted with the aid of the two-dimensional form of DQM in conjunction with Runge-Kutta. The results are validated by means of a published paper. Lastly, the role of parameters in determining vibrational frequency as well as deflection is explored through parametric studies. It was shown that the impactor speed and the time of the impact could be essential factors in determining the vibration behavior of the bones. This work can be used in the further investigation of the behavior of bones and physiological structures.

Isolated Spinal Accessory Nerve Palsy from Volleyball Injury

  • Holan, Cole A.;Egeland, Brent M.;Henry, Steven L.
    • Archives of Plastic Surgery
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    • 제49권3호
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    • pp.440-443
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    • 2022
  • Spinal accessory nerve (SAN) palsy is typically a result of posterior triangle surgery and can present with partial or complete paralysis of the trapezius muscle and severe shoulder dysfunction. We share an atypical case of a patient who presented with SAN palsy following an injury sustained playing competitive volleyball. A 19-year-old right hand dominant competitive volleyball player presented with right shoulder weakness, dyskinesia, and pain. She injured the right shoulder during a volleyball game 2 years prior when diving routinely for a ball. On physical examination she had weakness of shoulder shrug and a pronounced shift of the scapula when abducting or forward flexing her shoulder greater than 90 degrees. Manual stabilization of the scapula eliminated this shift, so we performed scapulopexy to stabilize the inferior angle of the scapula. At 6 months postoperative, she had full active range of motion of the shoulder. SAN palsy can occur following what would seem to be a routine volleyball maneuver. This could be due to a combination of muscle hypertrophy from intensive volleyball training and stretch sustained while diving for a ball. Despite delayed presentation and complete atrophy of the trapezius, a satisfactory outcome was achieved with scapulopexy.

배구 경기에서 팀 공격 성공을 위한 선수들의 수행 특성 평가 (Evaluation of performance characteristics in the seeress of team attack during volleyball game)

  • 이기청;이종경;천영진
    • 한국운동역학회지
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    • 제13권3호
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    • pp.241-252
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    • 2003
  • The purpose of this study was to evaluate performance characteristics in the success of team attack during volleyball game. Three dimensional analysis was performed with games of business teams. Analyzed variables were followed by the movement distance of a setter when A-quick was occurred, the position during the spike, the possibility area during the attack, the right and left distance of the assistance attacker, the distance between attacker and blocker, and the distance between blockers each others. 1. It is recommended that the movement distance of the setter be decreased in order to make stable set condition. 2. In order to make one person blocking, the formation was to be consisted of the right and left formation which was associated with the progressive attack performance of the assistance attacker. 3. It is useful to widen attack area. Also it is necessary to improve the enhancement of passing the ball against the blocking of an opponent player. Finally, it is necessary to develop kinematic variables to evaluate performance characteristics of players. Further study may consider the best defense position against the attack of the opponent player.

배구선수에서 Training과 Detraining 기간의 식행동 및 혈중 지질농도 (Food Habits and Serum Lipid Concentratons during the Periods of Training and Detraining in Volleyball Players)

  • 조여원;김지현;조미란;선우섭
    • 대한지역사회영양학회지
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    • 제4권2호
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    • pp.231-238
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    • 1999
  • This study was done to investigate the 12 college volleyball player's food behavior, nutrient intakes, and their serum lipid levels during the periods of training and detraining and to provide basic data for an effective program for the volleyball players during the period of detraining after the game season. The results were summarized as follows : The total daily energy intake of the players was $3,363{\pm}339kcal and 3,692{\pm}499kcal$ during the periods of the training and detraining, respectively. During the training period, daily intakes of protein, calcium and vitamin A, and $B_2$ were lower than the recommended dietary allowance for the players. During the detraining period, the players' daily intakes of calcium, iron, and vitamin A were even lower. However, the consumption of alcohol was dramatically increased during the period of detraining. The levels of serum triglyceride and very low density lipoprotein were significantly increased during the detraining period. Basal metabolic rates were significantly increased after the training period and diastolic pressure was decreased during the detraining period. In conclusion, out results suggest that the detraining of volleyball players for 10 days after intensive training, negatively affects their food behavior and serum lipid concentrations. Therefore, for the improvement of performance for the next game season, a planned program for the players' detraining period should be developed.

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배구 제자리 점프 블로킹 착지 시 숙련도에 따른 수직지면반력 변인 분석 (Analysis of the Vertical GRF Variables during Landing from Vertical Jump Blocking in Volleyball)

  • 염창홍;박영훈;서국웅
    • 한국운동역학회지
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    • 제17권4호
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    • pp.57-64
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    • 2007
  • The purpose of this study was to investigate comparative analysis of the vertical ground reaction force variables during landing from vertical jump blocking in volleyball through GRF analysis system. The subjects participated in this study were 6 male university volleyball player and 6 male acted as a control group. The results are as follows: 1. The skilled group was longer than the unskilled group in flight time during vertical jump blocking. 2. The skilled group was faster than the unskilled group in tFz2 during landing from vertical jump blocking. 3. The skilled group was higher than the unskilled group in Fz2 during landing from vertical jump blocking. 4. The skilled group was higher than the unskilled group in Fz2LR during landing from vertical jump blocking. 5. The skilled group was higher than the unskilled group in impulse during landing from vertical jump blocking. Consequently, during landing from vertical jump, the landing strategy of the skilled group was found as a form of a stiff landing. Therefore, this landing strategy will be required to strengthen of hip and knee extensors and ankle plantar flexors for injury prevention.

Effect of the Positions of Female Pro-Volleyball Players on the Stability of Shoulder Joints of the Dominant and Non-dominant Arms

  • Kim, Yong-Yeon;Shin, Hee-Joon;Kim, Bo-Kyung;Koo, Ja-Pung;Park, Joo-Hyun;Kim, Nyeon-Jun;Yun, Young-Dae;An, Ho-Jung
    • 국제물리치료학회지
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    • 제2권1호
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    • pp.229-236
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    • 2011
  • The purpose of this study was to comparatively analyze the active stability of shoulder joints according to the frequency of overhead motions, such as serving and spiking, engaged in by female professional volleyball athletes who play different positions, and to provide the results as the basic data for developing exercise programs to prevent shoulder joint injuries. The subjects of this study were 50 Korean female professional volleyball players and positions were as follows: left and right attackers, centers, setters, and liberos. The external rotation and internal rotation muscle strength and muscle strength ratios of the dominant and non-dominant arms of all subjects were measured using Biodex. The results of this study are as follows: Frist, no significant differences were found in the internal and external rotation muscle strength of the dominant and non-dominant arms between positions. Second, for the shoulder joint muscle strength ratio of the dominant arm, by position, the setter showed significantly greater stability compared to the other positions. Third, for the shoulder joint muscle strength ratio of the non-dominant arm, by position, no significant difference in stability between positions was found. Fourth, it was found that the dominant arm had significantly greater instability of the shoulder joint than the non-dominant arm for attackers and centers, but no significant difference was found for setters and liberos. This study comparatively analyzed the muscle strength ratios of the external/internal rotations and dominant/non-dominant arms, which can determine the stability of the shoulder joints between female professional volleyball playing positions that engage in jumps and spikes using only the dominant hand and positions that do not.

여자배구 경기에서 팀 공격 성공을 위한 선수들의 수행 특성 평가 (Evaluation of performance characteristics in the success of team attack during women's volleyball competition)

  • 이기청;배성제
    • 한국운동역학회지
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    • 제15권1호
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    • pp.1-18
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    • 2005
  • The purpose of this study was to evaluate performance characteristics. in the success of team attack during volleyball competition. For this, real game was analyzed using S-VHS video camera for three dimensional cinematography. The contents of this research were receive to set time, set to spike time, setter moving distance, ball position during set and attacker's relative ball position during jump and spike, and open area at spike. Among the various kinematical factors considered in this study, the ball height relative spiker and open area were found to be related to offensive performance. This finding implies that although their direct impact were not significant the other factors could have indirect impact on offensive performance by increasing open area. Thus, receiver, setter, assistant attacker, and main attacker should practice for successful performance in each stage. Lastly, it is necessary to develop kinematic variables to evaluate performance characteristics of players. Further study may consider the best defense position against the attack of the opponent player.

Graphical exploratory data analysis for ball games in sports

  • Yi, Seongbaek;Jang, Dae-Heung
    • Journal of the Korean Data and Information Science Society
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    • 제27권5호
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    • pp.1413-1421
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    • 2016
  • In this paper graphical exploratory data analyses are proposed for ball games in sports. The plot of sequence of scoring points of each team can be used to see how the playing game has been processed until the end of each set or quarter. With the plot of sequential score differences through all the games we can see a dominance of each team and the times of score changes, i.e., turnovers. The ternary plots show the contours of scoring compositions for each player and enable us to compare the scoring patterns of each team if any. Using the score sequence plot we also can see the score pattern distribution of players. For demonstration we use the results of the gold medal match between Russia and Brazil for men's volleyball and between USA and Spain for men's basketball at the London 2012 Summer Olympics.

청소년기 유도 선수에 발생한 상완골 소결절 단독 견열 골절 - 증례 보고 - (Isolated Avulsion of the Lesser Tuberosity of the Humerus in an Adolescent Judo Player - A Case Report -)

  • 염재광;정형진;최을오;이상림
    • Clinics in Shoulder and Elbow
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    • 제9권1호
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    • pp.119-123
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    • 2006
  • Isolated avulsion of the lesser tuberosity of the humerus in adolescent is rare injury. The mechanism of injury is acute forced external rotation and with the arm in abduction which has been reported in children participating in sports such as football, hockey, volleyball, wrestling and skateboarding. The diagnosis is often delayed despite chronic pain and disability. Authors report the unique case of a skeletally immature adolescent Judo player who had an isolated avulsion of the lesser tuberosity of the humerus with the references.