This study examined 142 volleyball games of the Men's Super League 2014/2015 seasons in Brazil from which we analyzed 24-26 games of each participating team, identifying 5,267 Zone 4 attacks for further analysis. Within these Zone 4 attacks, we analyzed the association between the effect of the attack carried out and the separate effects of serve reception, tempo and type of attack. We found that the reception, tempo of attack, second tempo of attack, and power of diagonal attack were predictors of the attack effect in Zone 4. Moreover, placed attacks showed a tendency to not yield a score. In conclusion, winning points in high-level men's volleyball requires excellent receptions, a fast attack tempo and powerfully executed of attacks.
RESUMO ABSTRACTThe aim of this study was to analyse the game practiced in the side-out Men's Volleyball Superliga 2014/2015. The sample was composed by 12 teams and it was analyzed 142 games, totaling 19,545 reception, setting and attack actions. The results showed the association between the effect of reception and attack location; effect of reception and attack time; effect of reception and attack effect; effect of attack location and attack time; effect of attack location and effect attack and effect of attack time and attack effect. Summarazing, in the high level Brazilian Men's Volleyball, the reception quality influences the attack organization, the determation of setting location and the game strategy. Besides that, the attack score was the most frequent on the game analisys, with higher indices of attack from position 3. Keywords: Game analysis. Volleyball. Side-out. IntroduçãoA análise do jogo assume um importante papel no desenvolvimento de diversas modalidades esportivas coletivas, apresentando-se como um fator determinante na escolha de indicadores pertinentes acerca da prestação dos jogadores em contextos específicos 1 . Além disso, tem como finalidade preparar a equipe para o confronto com o adversário, melhorar a qualidade de treinamento e analisar a estrutura do jogo 2 . No Voleibol, a análise de jogo, no que diz respeito aos efeitos dos procedimentos que o constituem (saque, recepção, levantamento, ataque, bloqueio e defesa), não é recente. O jogo é caracterizado por dois complexos: o complexo I (KI) ou side-out que consiste na sequência de ações formada pela recepção, levantamento e ataque e o Complexo II (KII) ou transição, que é determinado pela sequência de ações formada pelo saque, bloqueio, defesa e contra-ataque 3 . Ao comparar os complexos de jogo, observa-se que o side-out é o complexo de jogo que mais pontua 4 e permite o ataque efetivo logo após a recepção ao serviço do adversário 5 .
Background The aim of the present study was to analyse the effects of placebo on bench throw performance in Paralympic weightlifting athletes. Methods The study involved four Paralympic weightlifting male athletes (age: 40.25 ± 9.91 years, weight: 60.5 ± 8.29 kg, height: 1.60 ± 0.15 m) that visited the laboratory in three occasions, separated by 72 h. In the first session, the athletes were tested for bench press one repetition maximum (1RM). The other two sessions were performed in a randomized counter-balanced order and involved bench throw tests performed either after taking placebo while being informed that the capsule contained caffeine or without taking any substance (control). The bench throw tests were performed with loads corresponding to 50, 60, 70 and 80% of the bench press 1RM. Results According to the results, mean velocity (∆: 0.08 m/s, ES 0.36, p < 0.05) and mean propulsive velocity (∆: 0.11 m/s, ES 0.49, p < 0.05) at 50% of 1RM were significantly higher during placebo than control ( p < 0.05). However, there were no difference between control and placebo for 60, 70 and 80% of 1RM ( p > 0.05). Conclusion Our results suggest that placebo intake, when the athletes were informed they were taking caffeine, might be an efficient strategy to improve the performance of explosive movements in Paralympic weightlifting athletes when using low-loads. This brings the possibility of using placebo in order to increase performance, which might reduce the risks associated with ergogenic aids, such as side-effects and positive doping testing.
RESUMO O estudo buscou identificar em situação de Complexo I possíveis fatores preditores da vitória/derrota no voleibol. Foram analisados dezoito jogos, sendo três de cada equipa participante da Superliga Feminina 2011/2012 (Brasil). Aplicou-se a regressão logística multinomial, com o intuito de medir o grau de associação entre o efeito da receção, tipo de levantamento, tempo de ataque, tipo de ataque, tipo de oposição e efeito do ataque com o resultado final do set (vitória ou derrota). Os resultados demostram que as chances de derrota no set são aumentadas com os erros de receção, com as receções moderadas, com os erros de ataque e com os ataques que promovem a continuidade do jogo. O estudo indica a relevância da receção para a obtenção da vitória, em conjunto com a eficácia ofensiva, por meio da limitação do contra-ataque oponente ou pela própria aquisição do ponto. Palavras-chave: voleibol feminino, análise de jogo, desempenho no set ABSTRACT The study aimed to identify in a situation of side-out possible predictors of winning/losing in volleyball. Eighteen games were analyzed, three of each team participating in the Women Super league 2011/2012 (Brazil). The multinomial logistic regression was calculates to measure the level of association between Reception Effect, Setting's Type, Attack Time, Attacking Conditions, Opposition Type and Attack Effect and the Outcome Set (win or lose).The results showed that the probability off a loss was increased with receiving errors, moderate receiving, attacking errors and with attacks that promote the game's continuity. This study suggests that both offensive effectiveness, characterized by limiting the opponent's counterattack or even winning the point, and reception are important to obtain the victory.
REsumoO objetivo da pesquisa foi investigar as fontes de conhecimento que sustentam o processo de formação e o desenvolvimento profissional de treinadores de jovens atletas de basquetebol. A metodologia utilizada foi de natureza qualitativa, do tipo exploratória. A técnica de coleta de dados foi a entrevista semiestruturada e a técnica de análise foi a análise de conteúdo. Os sujeitos participantes da pesquisa foram seis treinadores de basquetebol de jovens atletas. Os resultados revelaram que a formação e o desenvolvimento profissional dos treinadores ocorreram por meio de fontes diversificadas de conhecimento, com destaque para a internet, o diálogo com treinadores experientes, as experiências como atleta, as experiências do cotidiano de trabalho, o curso de Educação Física e os cursos de curta duração. Identificou-se, ainda, a predominância de aprendizagens no contexto informal fora do ambiente educacional institucionalizado.Palavras-chave: Formação. Conhecimento. Treinador. Basquetebol.
Licença: Creative CommomResumo -Atualmente, no Voleibol de alto nível, é inquestionável o papel que o ataque assume no desenrolar do jogo e no rendimento das equipes, o que requer ataques rápidos, precisos e potentes, exigindo, para tal, o domínio técnico e a capacidade de adaptação aos constrangimentos situacionais do jogo. Desta forma, o objetivo deste trabalho foi o de analisar a relação entre o tempo e o tipo de ataque com o efeito do ataque em seleções nacionais juvenis de Voleibol masculino. Para tal, recorreu-se à análise de 1191 ações de ataque de seleções nacionais presentes no Campeonato Mundial Juvenil. Verificou-se que o efeito de ataque mais recorrente foi o ponto, sendo que os ataques mais rápidos apresentaram maior frequência de acontecimento, assim como os ataques potentes. O jogo mais rápido favoreceu a obtenção do ponto e o ataque potente emanou da necessidade de sobrepor-se ao sistema defensivo adversário. Palavras-chave: Voleibol; Tempo de ataque; Tipo de ataque; Efeito do Ataque. Abstract -
The purpose of the study was to compare elbow flexion peak torque (PT) and fatigue index (FI) during isokinetic concentric contractions in men and women with different training levels. Sixty-eight young men and women were divided into four groups: resistance trained men (RTM), non-resistance trained men (NRTM), resistance trained women (RTW) and non- resistance trained women (NRTW). Participants performed two tests on an isokinetic dynamometer, one to evaluate PT and one to evaluate FI. Significant interactions were found for sex and resistance training status with both PT and FI. In general, resistance-trained subjects had higher PT, and women showed lower PT than men. PT values were 67.12 ± 9.93 N·m for RTM, 49.9 ± 8.5 N·m for NRTM, 41.84 ± 7.52 N·m for RTW, and 26.05 ± 3.34 N·m for NRTW. Separate analysis revealed that RTM had higher PT than all other groups. However, FI was higher for NRTM than for RTM and NRTW and no difference was found between RTM and NRTW. FI was 37.86 ± 10.89 % for RTW, 45.74 ± 13.17 % for NTRW, 45.89 ± 8.24 % for RTM, and 51.92 ± 4.5 % for NRTM. Women produce lower PT, and have a higher fatigue tolerance than men of similar training status. Considering that women showed to be more resistant to fatigue than men, women can manipulate training variables differently from men, such as, including more repetitions at the same relative load or using higher relative loads at the same number of repetitions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
334 Leonard St
Brooklyn, NY 11211
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.