Background The long-term monitoring of internal and external training load is crucial for the training effectiveness of athletes. This study aims to quantify the internal and external training loads ...of collegiate male volleyball players during the competitive season. The internal and external training load variables were analyzed across mesocycles and playing positions. Methods Fourteen participants with age of 20.2 + or - 1.3 years, height of 1.81 + or - 0.05 m, and body weight of 70.8 + or - 5.9 kg were recruited. The data were collected over a 29-week period that was divided into four mesocycles: preparation 1 (P1, weeks 1-7), competition 1 (C1, weeks 8-14, including a 5-day tournament in week 14), preparation 2 (P2, weeks 15-23), and competition 2 (C2, weeks 24-29, including a 6-day tournament in week 29). Each participant wore an inertial measurement unit and reported the rating of perceived exertion in each training session. The internal training load variables included weekly session rating of perceived exertion, acute: chronic workload ratio, and training monotony and strain. The external training load variables included jump count and height and the percentage of jumps exceeding 80% of maximal height. Results C2 had the highest average weekly internal training load (3022 + or - 849 AU), whereas P2 had the highest average weekly acute: chronic workload ratio (1.46 + or - 0.13 AU). The number of weekly jumps in C1 (466.0 + or - 176.8) was significantly higher than in other mesocycles. Weekly jump height was significantly higher in C1, P2, and C2. Internal training load was positively correlated with jump count (rho = 0.477, p < 0.001). Jump count was negatively correlated with jump height (rho = -0.089, p = 0.006) and the percentage of jumps exceeding 80% of maximal height (rho = -0.388, p < 0.001). The internal and external training load variables were similar among different playing positions. Conclusion The participants exhibited significantly higher internal training load in C2 and higher jump height after P1. A high jump count was associated with higher internal training load and lower jump height. Excessive jumps may result in fatigue and reduce height. Keywords: Acute:chronic workload ratio, Jump count, Session rating of perceived exertion, Wearable device
Aim. The purpose of this paper is to demonstrate that the game of volleyball, through its means, contributes to ninth grade students, both to the consolidation and improvement of motor skills and to ...the development of motor qualities, speed, and strength. Methods. To test the motor qualities, we used the unique system of verification, assessment and detection" tests: 50 m speed run; throwing the 4 kg medicine ball back and forth; standing long jump. Results. Following the applied tests, it was observed: in the 50 m speed test, the subjects of the experimental group recorded an average value of 8.675 s in the initial test and an average value of 8.092 s in the final test; in the standing long jump, the subjects of the experimental group registered an average value of 1.826 m in the initial test and an average value of 1.968 m in the final test; when throwing the medicine ball forward, the subjects of the experimental group recorded an average value of 6.371m in the initial test and an average value of 7.296m in the final test; and when throwing the medicine ball back, the subjects of the experimental group registered an average value of 7.825m in the initial test and an average value of 8.988m in the final test. Conclusions. The game of volleyball, through its specific means, is effective in the development of motor qualities, strength, and speed, so that all the values of the indices of these motor qualities in the experimental group subjected to testing fell within the upper parameters of the evaluation sample Keywords: mobility, junior player, competition, national junior team.
The aim of this study was to describe the effects of 6 weeks of combined strength and jump training which incorporated moderate loads and high intensity contractions on the vertical jump ability ...(VJ), loaded jumps and velocity of execution in full squat in a group of professional male volleyball players during the competition season. It was hypothesized that the VJ improved by cross combined strength and jump training both characterized by high velocity of execution (>1m/s). The participants in this study were twelve players who competed in the first national division of the Spanish National League during the 2011-2012 season. The neuromuscular performance was estimated by unloaded (CMJ) and loaded countermovement jumps (CMJloaded) height (cm); and by velocity of displacement in the concentric phase of full squat (FS) (m/s). There was a significant increase in CMJ and CMJloaded after 6-week of training (5%, p<0.01; and 5.7%, p<0.05; respectively). These changes were accompanied by a small and moderate value of Effect Size (0.47, and 0.67; respectively). No significant differences were observed for velocity of displacement in FS. The linear correlation analysis showed a single moderate correlation statistically significant between the changes in CMJ-CMJloaded and CMJ-FS (r=0.62 and r=0.59, p<0.05; respectively). Albeit speculative, our results suggest that the use of moderate loads could be enough to improve the vertical jump performance, since in our study a load equivalent to 60% 1RM in the FS was not exceeded and jumping exercises were performed with light loads.Keywords: Resistance training; Plyometric exercise; Vertical jump; Lower Extremity, Velocity, Strength.Resumen: El objetivo de este estudio fue describir los efectos de 6 semanas de entrenamiento combinado de fuerza y salto, el cual incorpora cargas moderadas e intensidades de contracción altas, sobre la capacidad de salto vertical, saltos con cargas y la velocidad de ejecución en el ejercicio de sentadilla en un grupo de jugadores profesionales de voleibol durante la temporada de competición. Se estableció la hipótesis de que el salto vertical mejoro por el uso combinado de entrenamiento de fuerza y salto, ambos caracterizados por una alta velocidad de ejecución (>1m/s). El rendimiento neuromuscular fue estimado por la altura (cm) del salto sin cargas (CMJ), salto con cargas (CMJloaded), y por la velocidad (m/s) de desplazamiento en la fase concéntrica en la sentadilla completa (FS). Tuvo lugar un incremento significativo en CMJ y CMJloaded después de 6 semanas de entrenamientos (5%, p<0.01; y 5.7%, p<0.05; respectivamente). Estos cambios fueron acompañados por un valor de Tamaño del Efecto pequeño y moderado (0.47, and 0.67; respectivamente). No se observaron diferencias significativas en la velocidad de desplazamiento en FS. El análisis de correlación lineal mostró una correlación moderada estadísticamente significativa entre los cambios en CMJ-CMJloaded y CMJ-FS (r=0.62; y r=0.59, p<0.05; respectivamente). Aunque algo especulativo, nuestros resultados sugieren que el uso de cargas moderadas podría ser suficiente para mejorar el rendimiento del salto vertical, ya que en nuestro estudio no se excedió una carga equivalente al 60% de 1RM en FS y los ejercicios de saltos también fueron realizados con cargas ligeras. Palabras claves: Entrenamiento con resistencias, ejercicios pliométricos, salto vertical, extremidad inferior, velocidad, fuerza.
En este trabajo se evalúa cuales variables, dentro de las que resultan más entendibles para un atleta, resultan predictoras de la altura del salto con contramovimiento (CMJ). Doce jugadores de ...voleibol amateur (24,5 ± 2,7 años; 1,85 ± 0,6 m; 80,3 ± 5,2 kg; mean ± SD) participaron del estudio. Se evaluaron las relaciones entre 15 variables cinemáticas y la altura del salto usando el coeficiente de correlación se Spearman. Con un modelo de regresión multivariado, fue determinado que la velocidad máxima de extensión de la rodilla y el tiempo de transición durante el apoyo son predictores independientes. Se concluyó que la velocidad de extensión de rodilla es el factor más importante para la altura del salto y se observó que cambios dentro del rango tolerado para la acción de la rodilla, podrían afectar las evaluaciones basadas en la altura máxima del CMJ.
Esta pesquisa teve por objetivo analisar a utilização do Teaching Games for Understand (TGfU) e das Tecnologias da Informação e Comunicação (TIC) como recursos didáticos no processo de iniciação ...esportiva do voleibol. Optou-se por uma abordagem qualitativa e a realização de duas etapas: um levantamento diagnóstico com professores de voleibol para identificar as dificuldades táticas dos alunos; elaboração e implementação de uma Unidade Didática em turma de iniciação. Os resultados indicaram que as TIC – em especial a filmagem – em conjunto com o modelo TGfU contribuíram para alcançar os objetivos de ensino, em especial para a compreensão dos elementos táticos do jogo. Concluiu-se que mesmo com dificuldades vivenciadas no decorrer das aulas, muitos alunos adquiriram capacidade de jogar intencionalmente de acordo com os princípios táticos ensinados.
Volleyball games require good motor skills and cardiorespiratory skills. Power, strength and endurance become very influential factors in performance and winning the match. This study aims to compare ...the power, strength and endurance of volleyball athlete among different levels of competition. The explosive power of the leg was measured by a vertical jump test, while explosive power of the arm was measured by a medic ball throw test; multistage fitness test was used to measure aerobic endurance capacities. We concluded that elite athlete, both senior and junior, have many differences from local athletes based on power, strength and endurance.
Introdução: Considerando a prática difundida do voleibol, poucos estudos avaliam a atividade eletromiográfica e proprioceptiva de jogadores desse esporte. Objetivo: Comparar a atividade ...eletromiográfica dos músculos deltoide, porção clavicular e espinal, e o desempenho muscular e proprioceptivo em jogadoras de voleibol e mulheres não atletas. Métodos: Foram incluídas 40 mulheres, sendo 20 atletas de voleibol, no Grupo Experimental; e 20 não atletas, no grupo Controle. As seguintes variáveis foram coletadas: sensação de posição articular, detecção de movimento, torque concêntrico dos músculos rotadores mediais e laterais na velocidade de 60º/s e 180º/s e atividade eletromiográfica dos músculos durante o movimento de ataque. Resultados: O Grupo Controle apresentou maior pico de torque dos rotadores laterais (p=0,026) a 180°/s e maior ativação muscular do deltoide porção clavicular (p=0,028) e espinal (p=0,025). Conclusão: Assim, neste estudo, o Grupo Controle apresentou maiores diferenças musculares, considerando torque e ativação, do que o Experimental.
El síndrome de burnout en deportistas puede conllevar el abandono de la práctica deportiva en aquellos que lo padecen. En España entre el 1 y 5 % de los deportistas lo sufren, aunque en concreto con ...jugadores de voleibol, su prevalencia se desconoce. Por ello, el objetivo de este estudio fue analizar la prevalencia del síndrome de burnout en jugadores de voleibol, tanto a nivel general, como en relación con algunas variables sociodeportivas: género, categoría generacional, nivel competitivo, posición de juego, volumen de horas de juego, número de años de práctica y padecimiento o no del Covid-19. Participaron 309 jugadores de diferentes clubes de Andalucía, de los cuales 158 eran varones (51%) y 151 mujeres (49%), con edades entre 18 y 62 años (M = 23.65 años; DT = 7.27). Utilizando la versión reducida del Athlete Burnout Questionnaire (ABQ) se halló una prevalencia total de burnout de 3.9%. A nivel global, las puntuaciones en burnout varían en función del número de años de práctica. Según sus dimensiones, el agotamiento físico y emocional está influido por el volumen de entrenamiento y el haber padecido Covid-19 y devaluación de la práctica deportiva por la posición de juego y los años de práctica.
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