Youth Volleyball Research Articles

Intra-Positional and Inter-Positional Differences in Somatotype Components and Proportions of Particular Somatotype Categories in Youth Volleyball Players

Intra-Positional and Inter-Positional Differences in Somatotype Components and Proportions of Particular Somatotype Categories in Youth Volleyball Players

High Prevalence of Nontraumatic Shoulder Pain in a Regional Sample of Female High School Volleyball Athletes.

Background:Shoulder pain is becoming increasingly problematic in young players as volleyball gains popularity. Associations between repetitive motion and pain and overuse injury have been observed in other overhand sports (most notably baseball). Studies of adult athletes suggest that there is a shoulder pain and overuse problem present in volleyball players, but minimal research has been done to establish rates and causes in juvenile participants.Purpose:To establish rates of shoulder pain, regardless of whether it resulted in a loss of playing time, in female high school volleyball players. A secondary goal was to determine whether high repetition volumes correlated with an increased likelihood of experiencing pain.Study Design:Descriptive epidemiology study.Methods:A self-report survey focusing on the prevalence of pain not associated with a traumatic event in female high school youth volleyball players was developed. Survey questions were formulated by certified athletic trainers, experienced volleyball coaches, and biomechanics experts. Surveys were received from 175 healthy, active high school volleyball players in Iowa, South Dakota, and Minnesota.Results:Forty percent (70/175) of active high school volleyball players remembered experiencing shoulder pain not related to traumatic injury, but only 33% (23/70) reported taking time off to recover from the pain. Based on these self-reported data, activities associated with significantly increased risk of nontraumatic shoulder pain included number of years playing competitive volleyball (P = .01) and lifting weights out of season (P = .001). Players who reported multiple risk factors were more likely to experience nontraumatic shoulder pain.Conclusion:When using time off for recovery as the primary injury criterion, we found that the incidence of shoulder pain is more than twice as high as the incidence of injury reported by previous studies. Findings also indicated that the incidence of shoulder pain may be correlated with volume of previous volleyball experience.

Anthropometric and performance measures to study talent detection in youth volleyball.

The aim of this work was to study anthropometric and performance measurements in 60 young male volleyball players (YV) and 60 youth not active in the sport (YNA) to assess which of these would be more useful to study the characteristics of potential performers. Eight measures to assess anthropometric characteristics, six performance measures and two tests for joint mobility were used. Also relative age and level of maturation were assessed. The anthropometric variables, relative age and level of maturation measured did not show statistically significant differences between groups. The YV and YNA groups showed differences in the performance measures. YV group was characterized by a better performance of the ability to repeat short sprints, of the upper limbs, abdominal muscles and lower limbs, with a medium effect size (Shuttle Running Test: 0.6; Push-Up: 0.5; Sit-Up: 0.4; counter movement jump: 0.4). These performance variables were very sensitive and specific: the SRT measurement had the best positive likelihood ratio that indicates the utility of the test in identifying type of players (YV and YNA). In talent detection in youth volleyball, in the 11-13 age range, performance variables should be preferred to anthropometric ones.

Validation of the VERT wearable jump monitor device in elite youth volleyball players.

This technical report aims to determine the validity and the accuracy of the VERT Wearable Jump Monitor. The participants of this study were all experienced volleyball players from the U18 category from the Brazilian National team. To assess jump performance, the VERT scores were compared to the VERTEC (jump and reach device). Each athlete performed 3 attack and 3 block jumps in a random, counterbalanced order, and the average score was registered. In the attack jumps, the VERTEC and VERT mean ± SD scores were 70.9±8.2 and 76.3±7.5 cm, respectively, and the typical error of the estimate (TEE) as a coefficient of variation (CV) was 7.8% (90% CL 7.0 to 8.9%). VERTEC and VERT devices presented a very large Pearson’s correlation for attack jumps (r=0.75; 90% CL 0.68 to 0.81). In addition, the mean±SD block jumps were 53.7±6.1 and 58.5±5.7 cm for the VERTEC and VERT, respectively and the TEE as a CV was 7.9% (90% CL 7.1 to 8.9%). Pearson’s correlation coefficient was very large for block jumps (r=0.75; 90% CL 0.67 to 0.81). The VERT device was found to be a very practical tool to quantify jump performance in volleyball players.

Investigating discrepancies in program quality related to youth volleyball athletes’ needs support

Program quality has been outlined as an important predictor of positive outcomes in youth development programs; however, little evidence exists to support this, particularly within sport. Objective: The purpose of this study was to examine the associations between researcher- and coach-assessed program quality scores as they relate to youth volleyball athletes’ basic needs support. Design: Observational data and self-report data were gathered from coaches and youth. Researchers completed 84 observations using a measure of program quality across 14 teams. Coaches completed the same measure at the end of the season and 138 athletes (Mage = 14.50) from the 14 teams completed a self-report questionnaire pertaining to needs support. Data were analyzed using polynomial regressions with response surface methodology. Results: Athletes’ needs support was significantly (p < 0.001) associated with all domains of researcher- and coach-assessed program quality (i.e., safe environment, supportive environment, interaction, engagement), and between 20 and 35% of the variance in athletes’ needs support was explained by these variables. The degree of discrepancy between researcher- and coach-assessed program quality increased when progressing through three domains of program quality (safe environment, supportive environment, engagement). Response surface methods indicated that as the degree of agreement increased between researchers’ and coaches’ ratings of the safety of the environment, supportiveness of the environment, and opportunities for engagement, so did athletes’ basic needs support scores in a linear fashion. Conclusions: Practical implications surrounding coach education and the importance of knowledge translation between academics and practitioners are noted, and future research directions are discussed.

Reference values of hip abductor torque among youth athletes: Influence of age, sex and sports

Objective(1) To determine the reference values of hip abductor torque in youth athletes; (2) To investigate the influence of sex, age and sports on hip abductors torque. DesignCross-sectional. SettingSports clubs. Subjects301 volleyball, basketball and futsal athletes between 10 and 19 years of age. Main outcome measuresMean value of three maximal isometric hip abductor torques, evaluated using a hand-held dynamometer. ResultsThe mean values of maximal isometric hip abductor torque ranged from 1.03 to 1.50 Nm/kg. The dominant hip abductor torque values were greater in 15–19 years old (1.41 ± 0.27 Nm/kg) than in 10–14 years old (1.12 ± 0.31 Nm/kg). In addition, the hip abductor torque values were smaller in basketball players (1.15 ± 0.31 Nm/kg) than futsal (1.34 ± 0.37 Nm/kg) and volleyball players (1.28 ± 0.25 Nm/kg). The comparison of hip abductor torque between futsal and volleyball players revealed no difference. The hip abductor torque values were greater in male volleyball athletes (1.28 ± 0.25 Nm/kg) than female volleyball athletes (1.13 ± 0.22 Nm/kg). ConclusionThis study established reference values for maximal isometric hip abductor torque in youth volleyball, basketball and futsal athletes. In addition, the results demonstrated that sex, age and sports influenced hip abductor torque.

A season-long examination of the intervention tone of coach–athlete interactions and athlete development in youth sport

ObjectivesCoaches are a primary influence on athletes' development in youth sport (Horn, 2008). However, the intervention tone of coaches' behaviour has not been directly observed. The purpose of this study was to examine associations between the intervention tone exhibited by youth sport coaches and athletes' individual developmental trajectories over the course of a season. DesignShort-term longitudinal study with behavioural observation. MethodFifty-five athletes and their coaches from five youth volleyball teams were observed at three time points, and the intervention tone of interactive behaviour was systematically coded and organized by coach–athlete dyad. Athletes completed measures of the 4C's of athlete development (competence, confidence, connection, character) at each time point, which were used to create individualized developmental trajectories. Person-centred analyses were used to examine associations between athletes' developmental trajectories and their unique interactive experiences with their coach. ResultsCluster analysis revealed the presence of three distinct clusters based on athletes' developmental trajectories: 1) high and increasing, 2) low and decreasing, and 3) moderate and maintaining, with athletes from each team distributed across clusters. Analysis of dyadic interaction profiles revealed significant differences in interactive behaviour between clusters. ConclusionsResults suggest that differences in coach–athlete interactive experiences are associated with different developmental trajectories over the course of a season, even for athletes working with the same coach, highlighting the individualized nature of coaches' influence on young athletes. Practical implications for coaches include a critical awareness of their unique interactive relationship with each athlete independently, as well as the importance of fostering these relationships with regard to young people as more than just athletes.

TIME LOSS AND INJURY CHANGES WITH MULTIDISCIPLINARY PREVENTIVE APPROACH IN FEMALE VOLLEYBALL PLAYERS

BackgroundYouth volleyball players have high injury rates in shoulder, knee and ankle. Specific preventive programs could reduce time loss and injury severity reflecting in athlete's performance.ObjectiveTo describe the difference in...

Sports Skills in Youth Volleyball by Video Analysis Teaching Method Gaetano

Efficacy of the spike is important in volleyball score and efficiency of training process has a prior aim for coach, in the same time video analysis is used to purpose quantitative aspect of performance. Could be useful the use of performance as teaching method to improve single sport skills. The aim is to utilize this teaching methodology with visual feedback by video analysis to improve the technique model of spike. Methods is experimental and involve an under 21 women team, divided in control and experimental group, run of 10 training weeks while is going on the championship. Experimental group reviews itself by video without comments or helps of coach who evaluates specific technical aspects of spike by specific descriptors in check list of sport skill in presence of the athletes. The improvement of sports skills of control group is increased in minor percentage than of experimental group for difference of 12%. The different percentage could be attributed at the presence of the visual feedbacks in teaching training method. Data shows the future use of this tool in training and in physical education and not only for statistics or tactics scheme.

Video analysis in youth volleyball team

Parisi, F. & Raiola, G. (2014). Video analysis in youth volleyball team. J. Hum. Sport Exerc., 9(Proc1), pp.S584-S587. The aim of the study was to use video analysis in training to improve the performance of young athletes. Participants will be divided in two teams that will play the same “Under-21 championship”, but with a different average age (Team A: average age 14,41±1,66; Team B average age 18,94±1,59). Twelve matches (in 4 months) of both teams will be videotaped. Statistical data for each team will be extrapolated from them, and compared among them in order to take in correlations skills data. Only team A, the “young team”, will be given the opportunity to review errors and strong points of each match, so as to prepare for the successive match, according to the errors made in the matches. The videos will be analyzed by “Kinovea” software, while statistics analysed with “SoloStats123”. It is expected that there will be a performance improvement in young team A, around the same average level of “expert” team B. These results will be used as a starting point to analyze the differences between two teams with different average

A Critical Review of Service-Technique Teaching in Youth Volleyball

The purpose of this paper is to demonstrate the importance of using developmentally appropriate serving strategies that will promote the game of volleyball and facilitate learning while minimizing injury. A critical review of serving discusses the main developmental, maturational, and technical issues related to socialization and long-term development in volleyball. Teaching complex serving styles (such as the jump serve to athletes under the age of 14) might have implications for athletes’ long-term development and might lead to injury. The adoption of developmentally appropriate practices in coaching young athletes is still a novelty for many coaches. Therefore, this article stresses the importance of implementing adapted or modified games and of teaching skills in a progressive fashion to aid development.

Análise da aptidão física, da antropometria e da prevalência de sintomas osteomusculares na categoria infanto-juvenil do voleibol

INTRODUÇÃO: O controle da ocorrência de lesões durante todo o processo de treinamento possui expressiva importância para o atleta, bem como o monitoramento das adaptações físicas decorrentes do programa de exercícios. OBJETIVOS: Descrever o perfil antropométrico e a aptidão física dos times de voleibol infanto-juvenil e determinar a prevalência de sintomas osteomusculares. Métodos: Estudo longitudinal. Participaram 38 atletas da categoria infanto-juvenil do voleibol monitorados por quatro meses através de testes de aptidão física, mensurações antropométricas e do questionário de sintomas osteomusculares. Foram utilizadas análises descritivas e comparativas através de médias e desvio padrão e teste t de Student. RESULTADOS: Os principais indicadores estatisticamente significativos observaram-se nas variáveis: estatura (p = 0,001 para o sexo masculino e 0,003 para o feminino) envergadura para os meninos (p &lt; 0,001), arremesso (p = 0,003 para os meninos e p &lt; 0,001 para as meninas), abdominal para as meninas (p = 0,001). A maioria dos sintomas prevaleceu nas costas (56,5%), ombros (52,2%), quadris/coxas (52,2%) e joelhos (52,2%). CONCLUSÃO: O perfil dos atletas apresentou como principais características: o aumento da estatura, envergadura e força explosiva de membros superiores, resistência abdominal e agilidade. A grande frequência de respostas afirmativas de queixas nas costas, parte inferior e superior, ombros, quadril/coxas, joelhos e tornozelos reforça a necessidade de um acompanhamento a longo prazo da reação dos jovens desportistas ao treinamento, bem como fomenta estratégias de prevenção.

배구경기가 성장기 청소년의 신체부위별 상해에 미치는 영향

The purpose of this study was to analyze and compare the feature of sports injuries of growth period the youth volleyball players and to provide the basic information for prevention of sports injuries. A total of 286 (male, 176, female, 110) questionnaires were distributed to high school volleyball players. Each questionnaires consisted of the cause and occurrence of sports injuries, injury type, and the location of the body that the injury affected. Chi square analysis was conducted using SPSS 18.0 for windows. The results showed that there was a significant difference between male and female volleyball players in back and foot injuries(p.05), but no difference was found in head, neck, chest, arms, and legs. The most frequently occurred injuries were in the muscle and tendon for both gender(p.05). The reason why most volleyball players injured was due to their carelessness during workouts. After being injured, there was a significant difference between gender in first aid and therapeutic period. It is important for high school volleyball players to realize that a certain level of physical fitness and technique are needed to avoid sport injuries. However, most volleyball players do not perform fitness training, so participants will always be exposed to the risk of the injuries. Coaches should approach to the program which include a variety of physical training to enhance and maintain athletes`s health.

The effect of plyometric training program on young volleyball players in their usual training period

The purpose of this study was to find out the efficiency of composed plyometric training program on youth volleyball players force capabilities in their usual training period. The plyometric training program was applied during 16 week period where was attended twenty-one 12-19 years old youth volleyball players. Twelve of them were female and nine male volleyball players. There were three control testings. All subjects participated in following tests: standing long jump, depth leap long jump, medicine ball throws up in 10 seconds, medicine ball overhead throws forward against the wall in 10 seconds, maximal vertical jumps to the maximal height in 10 seconds, maximal vertical jump height. Testing results statistical analysis has shown athletes legs and arms speed force reliable improvement. Standing long jump, depth leap long jump and maximal vertical jump height test results, what has shown legs explosive power, has not shown remarkable reliable difference (P>0.05). Medicine ball throws and maximal vertical jumps to the maximal height in 10 seconds, what show speed force improvement, showed reliable difference (P<0.01).

Multidimensional Performance Characteristics in Talented Male Youth Volleyball Players

The purpose of this study was to determine whether anthropometric, physical, psychological, and skill test results could be used to discriminate between male junior volleyball players of varying ability. A total of 66 elite and nonelite male Estonian volleyball players aged 16–17 years were measured for anthropometric and physical variables and sport-specific skills. In addition, the players’ provided self-reports of dispositional achievement goals, perceived sport competence and enjoyment and their game intelligence was measured. Selected youth players scored better than nonselected youth players on physical (explosive strength), technical (passing and spiking), and cognitive (game intelligence) characteristics and reported higher mastery-approach goals, perceived sport competence and enjoyment of sport. The most discriminating variables were game intelligence, mastery approach goals, perceived sport competence and passing technique. These results suggest the important role of multidimensional performance measures in selecting and developing young male volleyball players. Structured talent identification and development programs have been developed for several sports, in particular athletics, rowing, gymnastics, field hockey and soccer, where success has been related to anthropometric, physiological and motor skill attributes (3,25,34,46). According to Williams and Reilly (50), research should adopt a multidisciplinary approach to talent identification. Recently, Vaeyens et al. (46) suggested that when researchers will concentrate on a combination of anthropometric, physical, and physiological measures, their predictive value has proven problematic in the majority of team sports. For example, Gabbett and coworkers demonstrated that subjective coach evaluation of passing and serving technique, but not physiological and anthropometric data, discriminate between successful and unsuccessful talent-identified junior volleyball players (20). In addition, an increasing number of researchers have argued that potentially important psychological variables are often overlooked within talent identification models (1,34,46). Research suggests that successful elite athletes posses a range of psychological characteristics including the ability to cope with anxiety and obstacles, selfconfidence, competitiveness, intrinsic motivation, and the ability to set and achieve

The age and gender effects on heart rate in children school volleyball players from Bosnia and Herzegovina

BackgroundVolleyball is a fun sport for children that is easy to learn and can be played in a gym, at the beach, or on grass. Playing volleyball help improve child...

The Relative Age Effect Among Female Brazilian Youth Volleyball Players

Click to increase image sizeClick to decrease image sizeKey words: Player selectionSport participationTalent identificationYouth sports Additional informationNotes on contributorsFabio E. FontanaPlease address correspondence concerning this article to Fabio Eduardo Fontana, 203 Wellness/Recreation Center, University of Northern Iowa, Cedar Falls, IA 50614-0241.

The Relative Age Effect Among Female Brazilian Youth Volleyball Players

The Relative Age Effect Among Female Brazilian Youth Volleyball Players

Análise comparativa da motivação entre atletas de voleibol, de um município do noroeste do Paraná

This objective of this descriptive study was to evaluate the motivation levels of youth volleyball teams, both male and female. To that end, the sample was made up of 24 volleyball players – 12 males and 12 females – between the ages of 14 and 17. As data collection methods, we used the Sports Motivation Scale and the Life Orientation Test. The results were tabulated statistically within normality, through statistical analysis. The results showed there were significant observable differences among teams, in regards to intrinsic and extrinsic motivation, as well as optimism. It can be therefore concluded, after data analysis, that the work undertaken in practice – especially by the coach – must value the individuality of each player in the team, as this was demonstrably a key factor for good athlete performance by athletes in competitive periods.

Influence of the position of players in rotation on differences between winning and loosing teams in volleyball

The aim of this study was to explore possible statistically significant differences between winning and loosing teams, on the basis of 6 situational parameters (serve, serve reception, block, defense, attack and counterattack) in two summary rotations (rotation “4-3-2” – when setter is in front line, and rotation “1-6-5”, when setter is in back line). We used a sample of 19 games played in the European youth volleyball championship in Zagreb 2003. Discriminative analysis (standard method) was employed to confirm or deny possible significance. Analysis showed significant differences between two groups (p<0.01) in both “summary rotations”. Winning teams performed all game phases better. Two variables with highest projection on discriminative functions in both summary rotations are ATTACK and SERVE. Possible influence of the quality of the performance of precedent game phase on the next game phase on the projection on discriminant functions can be occurred.