Relative Contributions of Strength, Anthropometric, and Body Composition Characteristics to Estimated Propulsive Force in Young Male Swimmers

• Cochrane, Kristen C. ^[1] ; Housh, Terry J. ^[1] ; Smith, Cory M. ^[1] ; Hill, Ethan C. ^[1] ; Jenkins, Nathaniel D.M. ^[1] ; Johnson, Glen O. ^[1] ; Housh, Dona J. ^[2] ; Schmidt, Richard J. ^[1] ; Cramer, Joel T. ^[1]
  1. [1] University of Nebraska–Lincoln

     University of Nebraska–Lincoln

     Estados Unidos

     
  2. [2] University of Nebraska Medical Center

     University of Nebraska Medical Center

     City of Omaha, Estados Unidos

     
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 29, Nº. 6, 2015, págs. 1473-1479
• Idioma: inglés
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• Dialnet Métricas: 1 Cita
• Resumen

  • The purpose of this study was to determine the relative contributions of isokinetic forearm flexion (FLX) and extension (EXT) peak torque (PT) at 180°·s-1, height (HT), percent body fat (%BF), and fat-free mass (FFM) to the prediction of estimated propulsive force (EPF) and which of these variables should be a focus of training in young male swimmers. Thirty young male swimmers (mean age ± SD = 12.4 ± 2.7 years) volunteered for this study. The subjects were members of local swimming clubs who competed in the front crawl. The swimmers were measured for FLX and EXT PT at 180°·s-1, HT, body mass (BM), arm muscle area (AMA), arm circumference, triceps skinfold, %BF, and FFM. Arm muscle area was used to calculate EPF. Zero-order correlations and stepwise multiple regression analyses were used to examine the relationships among variables and the relative contributions of FLX, EXT, HT, %BF, and FFM to the prediction of EPF. Forearm flexion PT at 180°·s-1, EXT, BM, HT, FFM, AMA, and EPF were significantly intercorrelated (r = 0.83–1.00). In addition, 4 variables contributed significantly to the prediction of EPF (standardized regression coefficients = FFM [1.00], FLX [0.92], EXT [-0.62], and HT [-0.35]). Percent body fat did not contribute to any of the stepwise models. These findings suggested that age-related increases in HT and FFM, as well as training for increases in FLX and EXT strength may improve propulsive force and swimming performance in young male swimmers.