The purpose of this study was to analyze the acute effect of static stretching on the performance of multiple sets in the bench press (BP) exercise. Fifteen men (26.2 ± 0.7 years, 72.4 ± 1.3 kg, 1.78 ± 0.1 m, 22.8 ± 0.3 kg·m) performed 4 sets of the BP exercise at 80% of 1 repetition maximum until concentric failure, both in the stretching condition (SC) and control condition (CC). The rate of force decline between the first and the fourth set was used as fatigue index. A randomized, counterbalanced, crossover design was performed with 48 hours between each session. Two static stretching exercises (pectoral and triceps brachii muscles) were performed in a single set before BP in SC, whereas in CC, subjects remained at rest for 150 seconds. For each stretching exercise, the muscle was held at the maximal stretched position for 30 seconds. No significant difference (p > 0.05) was identified for total repetitions performed in 4 sets (SC, 21.3 ± 0.7% vs. CC, 20.5 ± 0.7%) and in the fatigue index (SC, 75.5 ± 1.3% vs. CC, 73.2 ± 1.9%). The results suggest that the performance of multiple sets in the BP exercise does not seem to be influenced by previous static stretching.
PurposeThe purpose of this study was to assess the effect of static overstretching on performing a vertical jump.MethodsA methodological model was used, using descriptive and comparative methods on 45 randomly selected under-15-year-old male soccer players. Three jump test measurements were taken over a period of several days, where the first measurement included a pre-test in order to familiarize the athletes with using a contact mat, where maximum vertical jump height was recorded as a control. The second measurement had the athletes perform a vertical jump after static overstretching of the lower limbs. The third test had the athletes perform another vertical jump with no overstretching as another control.ResultsThe results found a significant difference in vertical jump heights (Δ% = 34.1%, <i>p</i> < 0.05), with jumps performed after static overstretching to be much lower.ConclusionsThe usage of such a static overstretching method negatively influences the vertical jump within the tested group of under-15 male soccer players.
ResumoO taekwondo (TKD) é um esporte de combate que focaliza em chutes na cabeça, giratórios, e saltos. A enfase em combinações técnico-táticas com velocidade e agilidade é uma característica essencial dessa modalidade. Portanto, esse artigo objetiva contribuir com uma análise crítica sobre ações técnico-táticas de taekwondistas, utilizando momentos relativos de esforço e pausa em competições oficiais. Essa revisão investigou arranjos táticos (i.e., ataques, defesas e bloqueios), performance técnica (pontos), chutes e socos, referentes a categoria de peso, classe de idade e gênero. De fato, as modificações das regras nos anos atuais aumentou as ações defensivas entre adultos, com cerca de 50% das ações em ataques, seguido de 30% de defesas e 20% de ações de bloqueio. Enquanto juvenis tendem a adotar uma estratégia ofensiva, com cerca de 90% das ações em ataques. Desde a introdução do sistema eletrônico, atletas de alto rendimento necessitam executar técnicas precisas e corretas para conquistar pontuação, por isso, atletas de elite tem utilizado técnicas de curta distância com chutes realizados pela perna de trás. Essa ação mostra eficácia em pontuar e auxilia competidores no aumento da capacidade defensiva e em contra-ataques. Por sua vez, programas de treinamento precisam ser específicos diante das regras, necessidades de categorias de peso, gênero e idade em atletas de elite no TKD.
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