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      Relação da força muscular com o desempenho no levantamento olímpico em praticantes de CrossFit® Translated title: Relación de la fuerza muscular con el rendimiento en levantamiento de peso olímpico en praticantes de CrossFit® Translated title: Correlation of muscle strength with weightlifting performance in CrossFit® practitioners

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          Abstract

          Resumo Objetivos: O objetivo do presente estudo foi analisar e relacionar a força muscular do back squat e front squat com o desempenho nos movimentos de levantamento olímpico snatch e clean em praticantes de CrossFit®. Método: Participaram deste estudo 22 adultos, que foram divididos de acordo com o desempenho nos movimentos de snatch e clean: fortes (29.6 ± 4.4 anos; 80.95 ± 9.57 kg; 12.2 ± 5.8% de gordura; 2.4 ± 0.9 experiência de treinamento) e fracos (28.5 ± 5.4 anos; 79.4 ± 6.8 kg; 13.6 ± 3.5% de gordura; 2.0 ± 1.1 experiência de treinamento). Todos os voluntários realizaram em dias separados os testes de uma repetição máxima nos exercícios: back squat, front squat, snatch e clean. Resultados: Os voluntários classificados com o melhor desempenho no snatch e clean apresentaram maior força no back squat (154.9 ± 20.3 kg vs. 132.7 ± 11.6 kg; p = 0.009) e no front squat(139.0 ± 14.5 kg vs. 116.8 ± 11.3 kg; p = 0.002), quando comparados aos voluntários mais fracos. Além disso, foram observadas correlações fortes entre a força relativa do back squat (r = 0.83; r = 0.76; p = 0.001) e do front squat (r = 0.73; r = 0.83; p = 0.001) com a performance nos exercícios snatch e clean, respectivamente. Conclusões: Portanto, uma força superior em exercícios básicos, como o back squat e o front squat, podem contribuir para o desempenho do levantamento olímpico em praticantes de CrossFit®.

          Translated abstract

          Resumen Objetivo: El propósito del presente estudio fue analizar y relacionar la fuerza muscular de la sentadilla por delante y por detrás con el rendimiento en los movimientos de halterofilia de arranque y de cargada en practicantes de CrossFit®. Método: Participaron en este estudio 22 adultos que fueron divididos de acuerdo con el rendimiento en los movimientos de arranque y cargada: fuertes (29.6 ± 4.4 años; 80.95 ± 9.57 kg; 12.2 ± 5.8% de grasa corporal; 2.4 ± 0.9 experiencia de entrenamiento) y débiles (28.5 ± 5.4 años; 79.4 ± 6.8 kg; 13.6 ± 3.5% de grasa corporal; 2.0 ± 1.1 experiencia de entrenamiento). Todos los voluntarios realizaron, en días diferentes, los test de una repetición máxima en los ejercicios: sentadilla por detrás, sentadilla por delante, arranque y cargada. Resultados: Los voluntarios clasificados con el mejor rendimiento en el arranque y en la cargada presentaron mayor fuerza en la sentadilla por detrás (154.9 ± 20.3 kg vs. 132.7 ± 11.6 kg; p = 0.009) y en la sentadilla por delante (139.0 ± 14.5 kg vs. 116.8 ± 11.3 kg; p = 0.002) cuando fueron comparados con los voluntarios más débiles. Además, se observaron correlaciones fuertes entre la fuerza relativa de la sentadilla por detrás (r = 0.83; r = 0.76; p = 0.001) y la sentadilla por delante (r = 0.73; r = 0.83; p = 0.001) con el rendimiento en los ejercicios de arranque y cargada, respectivamente. Conclusión: Por tanto, una mayor fuerza en ejercicios básicos, como la sentadilla por detrás y por delante, pueden contribuir para el rendimiento de los ejercicios olímpicos en practicantes de CrossFit®.

          Translated abstract

          Abstract Objectives: The aim of the present study was to analyze and correlate muscle strength of the back and front squat with performance in the movements of weightlifting snatch and the clean in CrossFit® practitioners. Method: Twenty-two adults participated in this study and were divided according to their performance in the snatch and clean movements: stronger (29.6 ± 4.4 years; 80.95 ± 9.57 kg; 12.2 ± 5.8% body fat; 2.4 ± 0.9 training experience) and weaker (28.5 ± 5.4 years; 79.4 ± 6.8 kg; 13.6 ± 3.5% body fat; 2.0 ± 1.1 training experience). All volunteers completed one-repetition maximum tests, in separate days, in the following exercises: back squat, front squat, snatch and the first phase of the clean. Results: The volunteers classified with a superior performance in the snatch and clean presented a higher strength in the back squat (154.9 ± 20.3 kg vs 132.7 ± 11.6 kg; p = 0.009) and front squat (139.0 ± 14.5 kg vs 116.8 ± 11.3 kg; p = 0.002) as compared with the weaker volunteers. Additionally, there were strong correlations between relative strength in the back squat (r = 0.83; r = 0.76; p = 0.001) and front squat (r = 0.73; r = 0.83; p = 0.001) with the performance in the snatch and clean exercises, respectively. Conclusions: Therefore, a superior strength in basic exercises, such as back and front squat can contribute to weightlifting performance in CrossFit® practitioners.

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          Strong correlation of maximal squat strength with sprint performance and vertical jump height in elite soccer players.

          U Wisloff (2004)
          A high level of strength is inherent in elite soccer play, but the relation between maximal strength and sprint and jumping performance has not been studied thoroughly. To determine whether maximal strength correlates with sprint and vertical jump height in elite male soccer players. Seventeen international male soccer players (mean (SD) age 25.8 (2.9) years, height 177.3 (4.1) cm, weight 76.5 (7.6) kg, and maximal oxygen uptake 65.7 (4.3) ml/kg/min) were tested for maximal strength in half squats and sprinting ability (0-30 m and 10 m shuttle run sprint) and vertical jumping height. There was a strong correlation between maximal strength in half squats and sprint performance and jumping height. Maximal strength in half squats determines sprint performance and jumping height in high level soccer players. High squat strength did not imply reduced maximal oxygen consumption. Elite soccer players should focus on maximal strength training, with emphasis on maximal mobilisation of concentric movements, which may improve their sprinting and jumping performance.
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            Developing maximal neuromuscular power: part 2 - training considerations for improving maximal power production.

            This series of reviews focuses on the most important neuromuscular function in many sport performances: the ability to generate maximal muscular power. Part 1, published in an earlier issue of Sports Medicine, focused on the factors that affect maximal power production while part 2 explores the practical application of these findings by reviewing the scientific literature relevant to the development of training programmes that most effectively enhance maximal power production. The ability to generate maximal power during complex motor skills is of paramount importance to successful athletic performance across many sports. A crucial issue faced by scientists and coaches is the development of effective and efficient training programmes that improve maximal power production in dynamic, multi-joint movements. Such training is referred to as 'power training' for the purposes of this review. Although further research is required in order to gain a deeper understanding of the optimal training techniques for maximizing power in complex, sports-specific movements and the precise mechanisms underlying adaptation, several key conclusions can be drawn from this review. First, a fundamental relationship exists between strength and power, which dictates that an individual cannot possess a high level of power without first being relatively strong. Thus, enhancing and maintaining maximal strength is essential when considering the long-term development of power. Second, consideration of movement pattern, load and velocity specificity is essential when designing power training programmes. Ballistic, plyometric and weightlifting exercises can be used effectively as primary exercises within a power training programme that enhances maximal power. The loads applied to these exercises will depend on the specific requirements of each particular sport and the type of movement being trained. The use of ballistic exercises with loads ranging from 0% to 50% of one-repetition maximum (1RM) and/or weightlifting exercises performed with loads ranging from 50% to 90% of 1RM appears to be the most potent loading stimulus for improving maximal power in complex movements. Furthermore, plyometric exercises should involve stretch rates as well as stretch loads that are similar to those encountered in each specific sport and involve little to no external resistance. These loading conditions allow for superior transfer to performance because they require similar movement velocities to those typically encountered in sport. Third, it is vital to consider the individual athlete's window of adaptation (i.e. the magnitude of potential for improvement) for each neuromuscular factor contributing to maximal power production when developing an effective and efficient power training programme. A training programme that focuses on the least developed factor contributing to maximal power will prompt the greatest neuromuscular adaptations and therefore result in superior performance improvements for that individual. Finally, a key consideration for the long-term development of an athlete's maximal power production capacity is the need for an integration of numerous power training techniques. This integration allows for variation within power meso-/micro-cycles while still maintaining specificity, which is theorized to lead to the greatest long-term improvement in maximal power.
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              Influence of Strength on Magnitude and Mechanisms of Adaptation to Power Training

              To determine whether the magnitude of performance improvements and the mechanisms driving adaptation to ballistic power training differ between strong and weak individuals.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                ramd
                Revista Andaluza de Medicina del Deporte
                Rev Andal Med Deporte
                Centro Andaluz de Medicina del Deporte (Sevilla, Sevilla, Spain )
                1888-7546
                2172-5063
                June 2018
                : 11
                : 2
                : 84-88
                Affiliations
                [2] Sergipe orgnameUniversidade Federal de Sergipe orgdiv1Programa de Pós Graduação em Educação Física Brazil
                [1] Brasília Distrito Federal orgnameUniversidade Católica de Brasília orgdiv1Programa de Pós Graduação em Educação Física Brazil
                Article
                S1888-75462018000200084
                10.1016/j.ramd.2015.11.005
                712e8bcb-8635-44b1-9e0a-a1737d1d1416

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 29 August 2015
                : 16 November 2015
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 17, Pages: 5
                Product

                SciELO Spain


                Desempenho,Potência,Treinamento de força,Entrenamiento de fuerza,Rendimiento,Power,Strength training,Potencia,Performance

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