RESEARCH ARTICLE


Mathematical Basis for Modeling Swimmer Power Output in the Front Crawl Tethered Swimming: An Application to Aerobic Evaluation



D.M. Pessôa Filho1, 2, B.S. Denadai *, 2
1 Department of Physical Education, College of Science, UNESP Bauru, São Paulo, Brazil
2 Human Performance Laboratory, UNESP Rio Claro, São Paulo, Brazil


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Creative Commons License
© 2008 Filho et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Human Performance Laboratory, UNESP Rio Claro, São Paulo, Brazil; E-mail: bdenadai@rc.unesp.br


Abstract

The purposes of this manuscript were to discuss the propelling hydrodynamics in human tethered swimming, and its application to strength evaluation and to approach power-time limit model (P-tLim) in tethered-crawl (PuTeth-tLim). Physiological and mechanical characteristics of tethered and free swimming have shown to be very similar, and thus tethered swimming is a reliable condition for evaluation and training. Hydrodynamics assumptions for hydrofoil in free swimming were applied for tethered swimming to support the power-time limit model reproduction. Critical power in crawl-tethered (PuTethCrit) was shown to be closely related to the critical velocity determined during free swimming and performance of competitive distances ranged from 200 to 1500-m. These results recognize the PuTeth-tLim model as a suitable method to reproduce P-tLim model in swimming, but the reliability of the PuTethCrit as an index of aerobic capacity, and training intensity must be explored in further researches.

Keywords: Active drag force, Tethered swimming, Hydrofoil mechanics, Power-time limit model.