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Force production and spatial arm coordination profile in arm crawl swimming in a fixed position

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Resumo:This study analyzed the relationship between mechanical force production and spatial arm position of the swimming movement for each side of the swimmer. Eight internationally recognized male swimmers performed fix positioned arm only swimming with a dynamometer synchronized with underwater cameras. The upper arm positions (α in side, β in frontal view) and the elbow angles (γ in 3D) were determined at the moment where the force production reached the peak (Fmax) and the maximal values of rate of force development (RFDmax). RFDmax and α values showed significant differences between the sides (P<0.05). To show the motion integration structure of the performance, Multiple Regression Analysis (MRA) was employed separately for both sides. For the criterion variable, the impulse of force (ImpF50%) was calculated. The defined parameters as the mechanical and spatial predictor system were used for the model. The results of the MRA showed that the predictor system yielded the model structure of the variables that explain the criterion variables for ImpF50% by the dominant (P=0.007) and by the nondominant side (P=0.001), respectively. The alternate contribution of the variables to the models can objectively express the performance difference between the two sides of the swimmer.
Autores principais:Karsai, István
Outros Autores:Garrido, N.; Louro, Hugo; Leitão, L.; Magyar, F.; Alves, F.; Silva, António
Assunto:analysis of variance biomechanical phenomena humans male muscle strength dynamometer muscle regression analysis ime factors upper extremity young adult motor activity muscle strength swimming skeletal
Ano:2010
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Instituto Politécnico de Santarém
Idioma:inglês
Origem:Repositório Científico do Instituto Politécnico de Santarém

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