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01.03.2012 | Original Article

Tracking the performance, energetics and biomechanics of international versus national level swimmers during a competitive season

verfasst von: Mário J. Costa, José A. Bragada, Jean E. Mejias, Hugo Louro, Daniel A. Marinho, António J. Silva, Tiago M. Barbosa

Erschienen in: European Journal of Applied Physiology | Ausgabe 3/2012

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Abstract

The purpose of this study was to track and compare the changes of performance, energetic and biomechanical profiles of international (Int) and national (Nat) level swimmers during a season. Ten Portuguese male swimmers (four Int and six Nat level subjects) were evaluated on three different time periods (TP₁, TP₂, TP₃) of the 2009–2010 season. Swimming performance was assessed based on official time’s lists of the 200-m freestyle event. An incremental set of 7 × 200 m swims was applied to assess the energetic and biomechanical data. Measurements were made of: (1) velocity at the 4 mmol of lactate levels (V4), stroke index at V4 (SI@V4) and propelling efficiency at V4 (η _p@V4), as energetic estimators; (2) stroke length at V4 (SL@V4) and stroke frequency at V4 (SF@V4), as biomechanical variables. The results demonstrated no significant variations in all variables throughout the season. The inter-group comparison pointed out higher values for Int swimmers, with statistical differences for the 200 m performance in all time periods. Near values of the statistical significance were demonstrated for the SI@V4 in TP₁ and TP₃. The tracking based on K values was high only for the SI@V4. It is concluded that a high stability can be observed for elite swimmers performance, energetic and biomechanical profiles throughout a single season. Int swimmers are able to maintain a higher energetic and biomechanical capacity than Nat ones at all times. The SI@V4 may be used as an indicator of performance variation.

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Titel: Tracking the performance, energetics and biomechanics of international versus national level swimmers during a competitive season
verfasst von: Mário J. Costa
José A. Bragada
Jean E. Mejias
Hugo Louro
Daniel A. Marinho
António J. Silva
Tiago M. Barbosa
Publikationsdatum: 01.03.2012
Verlag: Springer-Verlag
Erschienen in: European Journal of Applied Physiology / Ausgabe 3/2012
Print ISSN: 1439-6319
Elektronische ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-011-2037-6

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