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  • 1 University of Pécs Institute of PE and Sport Sciences Pécs Hungary
  • 2 University of Trás-os-Monte and Alto Douro Department of PE and Sport Vila Real Portugal
  • 3 Health and Human Development Research Center for Sport Sciences Vila Real Portugal
  • 4 Sport Sciences School of Rio Maior Rio Maior Portugal
  • 5 Technical University of Lisbon Faculty of Human Movement Kinetics Lisbon Portugal
  • 6 University of Pécs Institute of Physical Education and Sport Science Faculty of Natural Science P.O. Box 266 H-7624 Pécs Hungary
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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.

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