Este estudio analiza la eficacia de un programa de entrenamiento perceptivo basado en la orientación de la atención para la mejora de la toma de decisiones y el rendimiento en la acción de bloqueo de ...voleibol. 16 jugadoras juveniles fueron distribuidas en tres grupos: vídeo (n=6), que recibió ocho sesiones de entrenamiento en vídeo; mixto (n=5), que recibió 4 sesiones en vídeo y 4 sesiones de práctica en campo; y control (n=5), que completó las pruebas de evaluación. Los resultados muestran cómo el programa de entrenamiento mejoró la toma de decisiones de las jugadoras, ya que redujeron su tiempo de reacción (F(1,13)=9,237, p=0,009, ηp2=0,415) manteniendo el mismo porcentaje de aciertos. Sin embargo, es necesaria la práctica en campo para lograr transferir dichos aprendizajes al juego real, ya que sólo el grupo mixto mejora el porcentaje de aciertos en el test de rendimiento en campo (F(2,13)=8,608, p=0,004, ηp2=0,570; t(4) =-6,216, p=0,003).
The same training stimulus can provide different physiological adaptations for athletes of the same team. Thus, the aim of this study was to analyze and compare the load training of starters and ...nonstarters players, athletes of a men’s volleyball team at different times of the season. The sample consisted of fifteen men’s volleyball superleague athletes who were divided into two groups of starters and nonstarters players. The training load of the ten weeks of the team’s preparation period for the main championship season in which no games were performed was selected for the study. The method of subjective perceived of effort (session-RPE) proposed by Foster et al. (2001) was used to quantify the training load. The group of starters players had higher total weekly training load (TWTL) and RPE values in the average of the ten weeks of training (p<0.05). Higher TWTL values for starters players in the preparatory and pre-competitive period compared to nonstarters players was also demonstrated (p<0.05). When different weeks were analyzed separately, weeks three and seven presented higher TWTL and RPE values for starters players compared with nonstarters players . The results presented in this study showed that starters players showed greater internal training load compared to nonstarters players.
This study was done with the aim of determining the effects a programmed training would have on the changes in the explosive strength of young female volleyball players. The sample consisted of 30 ...female volleyball players, aged 14 to 16, divided into two groups – the experimental one (n=15) and the control group (n=15). The experimental group was comprised of the players from the club OK ‘Desetka’, who, apart from the basic technical and tactical training process, underwent a specially designed programme for developing explosive strength two times a week (on Tuesdays and Thursdays). The experimental programme was applied during the period of preparations before the official beginning of the regional competitions for cadets. The control group was comprised of the players from the club OK ‘Millennium’, who, during the same period of time, underwent only those training sessions which had previously been planned within the annual plan and programme of the club. Explosive strength evaluation included four sets of tests: the squat jump (SJ), countermowement jump (CMJ), drop jump (DJ), one-legged CMJ (OLCMJ). The effects of the progremmed training on the development of the explosive strength of the young female volleyball players was determined by the Covariance Analysis, ANCOVA. The results obtained in such a way showed the statistically significant improvement in the parameters tested within the experimental group. The difference was insignificant in the OLCMJ test only. The results point to the conclusion that the experimental training programme had positive effects on the changes of explosive strength of young female volleyball players.
El objetivo del estudio fue analizar la participación y la influencia del jugador líbero en la fase de ataque y en la fase de defensa en voleibol masculino de alto nivel. La muestra de estudio estuvo ...compuesta por 1101 acciones de juego de recepción y defensa, de los cuatro equipos masculinos mejor clasificados en los JJOO de Pekin 2008. Las variables consideradas en el estudio fueron: clasificación del equipo, jugador receptor/defensa, zona de recepción/defensa, eficacia de recepción/defensa, eficacia de la colocación, zona de ataque/contraataque, tiempo de ataque/contraataque, eficacia de ataque/contraataque. La medida de dichas variables se realizó mediante la observación sistemática, indirecta y externa. Se recurrió a la estadística descriptiva y, posteriormente, se utilizaron técnicas de estadística inferencial, basada en tablas de contingencia, valores de Chi-cuadrado y V de Cramer. Los resultados mostraron que, en la fase de defensa, hubo asociaciones significativas entre: el jugador que defiende y la zona de defensa, predominando la defensa del líbero en zona 5; el jugador que defiende y la eficacia de la defensa, siendo mejorada por parte del líbero; el jugador que defiende y la zona de contraataque, incrementándose los ataques por zona 6 cuando defiende el líbero.
El objetivo principal de este estudio fue analizar el saque empleado por las jugadoras de vóley playa femenino, para determinar si existen diferencias en función del nivel de juego. Se analizaron ...1.100 acciones de saque. Las variables del saque estudiadas fueron: tipo, profundidad de golpeo, lateralidad, trayectoria, destino, y técnica de golpeo. Se realizó un estudio de confiabilidad, para determinar el grado de concordancia inter e intraobservadores, llegando a alcanzar una concordancia entre los observadores >0,80. Los resultados del análisis correlacional mostraron una diferencia en el patrón de saque utilizado tras el cruce de variables criterio estudiadas, mostrando el test de Chi-cuadrado de Pearson significación en el cruce (p<0,05). El patrón de saque identificado para parejas con nivel internacional, mostró una mayor dificultad en ejecución y precisión, convirtiéndolo en el primer elemento de ataque; mientras que para las de nivel nacional la dificultad técnica en ejecución y precisión fue menor.
The aim of this study was to determine the possible significance of differences in the area of aerobic capacity among two groups of volleyball players. Laboratory measurements were performed on ...sixty-eight male subjects, all members of the A1 Croatian volleyball league, who were divided into two groups. The first group consisted of a higher level volleyball players (n = 34) with a recent national team status who appeared in qualification matches for the European or World Championships. The second group consisted of club-level players who were members of clubs playing in the A1 Croatian league and were never members of the national teams (n = 34). Their aerobic capacity was estimated by the progressive maximal test performed on a motor-driven treadmill. The following variables were studied: relative maximal oxygen uptake (VO.sub.2max -ml kg-1 min-1), relative maximal oxygen uptake at anaerobic threshold (VO.sub.2AT - ml kg.sup.-1 min.sup.-1) percentage of VO.sub.2max at anaerobic threshold (%VO.sub.2max - %), maximum speed before exhaustion (V.sub.max - km h.sup.-1), and speed of the treadmill at anaerobic threshold (V.sub.AT - km h.sup.-1). The group of the national-level volleyball players had numerically better results in all the measured variables and the T-test for independent groups showed a statistically significant difference (p<.05) in two of the five measured variables (V.sub.max and V.sub.AT), with large and moderate magnitudes which were observed in those two variables (Cohen's d 0.75 and 0.57). A player's participation in top-level clubs and national selections implies his exposure to an additional training volume, workouts of higher quality and intensity, which can ultimately have a positive effect on aerobic capacity indicators and certain neuromuscular adaptations of the lower extremities. Volleyball players with a higher level of aerobic capacity recover quickly between points and sets and they have the ability to delay fatigue, which can result in a better situational efficiency in long points, sets and matches. Players with better neuromuscular control and movement biomechanics can perform more efficiently during a volleyball match. Among other factors, this can be a possible reason for their selection in the national team. Key words: oxygen consumption, anaerobic threshold, biomechanics Osnovni cilj ovog istrazivanja bio je utvrditi znacajnost razlika u pokazateljima aerobnih sposobnosti izmedu dviju skupina odbojkasa seniora. Osnovni kriterij za svrstavanje odbojkasa u pojedinu skupinu bilo je sudjelovanje ili nesudjelovanje pojedinca u hrvatskim nacionalnim selekcijama koje su nastupale na kvalifikacijskim natjecanjima za europska ili svjetska prvenstva. Sukladno postavljenom kriteriju pojedinac je mogao biti svrstan u skupinu reprezentativnih (n=34) ili klupskih (n=34) odbojkasa. Aerobne sposobnosti procijenjene su standardnim protokolom koji se primjenjuje u Sportskom dijagnostickom centru Kinezioloskog fakulteta Sveuciilista u Zagrebu. To je progresivni test opterecenja na pokretnom sagu uz konstantan nagib od 1,5%. Analizirano je pet varijabli: relativni maksimalni primitak kisika (VO.sub.2max - ml kg1 min1), relativni maksimalni primitak kisika na anaerobnom ventilacijskom pragu (VO.sub.2AT - ml kg1 min1), postotak maksimalnog primitka kisika na anaerobnom pragu (%%VO.sub.2max- %), maksimalna brzina pokretnog saga (V.sub.max- km h.sup.-1) i brzina saga pri anaerobnom ventilacijskom pragu (V.sub.AT- km h.sup.-1). Reprezentativni igraci postigli su numericki bolje rezultate u svim mjerenim varijablama, a t-test za nezavisne uzorke pokazao je da statisticki znacajna razlika (p<0,05) postoji u dvije od pet analiziranih varijabli (V.sub.max i V.sub.AT). Participacija igraca u kvalitetnijim klupskim i reprezentativnim programima te nastupi u kvalitetnijim utakmicama mogu doprinijeti adaptaciji pojedinih neuromuskularnih karakteristika donjih ekstremiteta te pojedinih pokazatelja aerob-noga kapaciteta. Bolja misicna i kardiovaskularna izdrzljivost te mehanicke karakteristike, koje se ocituju u boljoj ekonomicnosti trcanja skupine reprezentativnih igraca, pruzaju mogucnosti za brzi oporavak odbojkasa izmedu poena i setova, odgadaju pojavu umora i pridonose kvalitetnijoj bio-mehanickoj izvedbi elemenata igre, sto omogucava bolju situacijsku ucinkovitost koja je i kljucni faktor za reprezentativnu selekciju. Kljucne rijeci: aerobni kapacitet, primitak kisika, anaerobni prag, biomehanika
Celotno besedilo
Dostopno za:
DOBA, FSPLJ, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK