NADAR! ADS
Como a transição da natação subaquática para a natação de superfície deve ser realizada por nadadores competitivos?
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Cinemática, Coordenação Entre Membros, Desempenho, Transformação Linear DiretaResumo
Apesar da crescente importância da fase subaquática de saídas e viradas na competição e da sua influência positiva na subsequente natação de superfície, não há evidências sobre como deve ser realizada a transição da natação subaquática para a de superfície. Portanto, o objetivo do presente estudo foi examinar o papel dos parâmetros segmentais, cinemáticos e coordenativos na velocidade de nado durante as fases de pré-transição e transição. Um total de 30 nadadores nacionais do sexo masculino realizaram 4 × 25 m (uma em cada braçada) a partir de um push start em velocidade máxima enquanto foram registrados em vista lateral por duas câmeras sequenciais (50 Hz), e seus parâmetros cinemáticos e coordenativos de natação foram calculados por meio de algoritmos bidimensionais de transformação linear direta (DLT). Ao contrário da pré-transição, a análise de regressão para trás da transição previu significativamente a velocidade de natação em todos os nados, exceto nado peito (R2 variando de 0,263 no nado crawl a 0,364 no nado borboleta). A coordenação intermembros foi preditora no nado borboleta (p = 0,006), enquanto a profundidade e inclinação do corpo foram preditores nos nados alternados (crawl (p = 0,05) e nado costas (p = 0,04)). Estes resultados sugerem que a posição do corpo e os parâmetros coordenativos da natação (além da frequência e comprimento das batidas de perna ou braçada) têm uma influência importante no desempenho da transição, que depende dos nados.
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NOTAS
Artigo adaptado e traduzido para o português pelos editores de NADAR! SWIMMING MAGAZINE para republicação, conforme normas de submissão do periódico. Versão original em: https://www.mdpi.com/1660-4601/19/9/4938 LICENÇA ORIGINAL E DA ADAPTAÇÃO: https://creativecommons.org/licenses/by/4.0/.
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Copyright (c) 2023 Jelena Stosic, Santiago Veiga, Alfonso Trinidad, Enrique Navarro
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
