Validity of the power-time to exhaustion model in the tethered-crawl stroke, through relationships to the distance and velocity-time to exhaustion models
Authors
Dalton Müller Pessôa Filho
Elvancir Pereira do nascimento
Benedito Sérgio Denadai
Abstract
Twenty four swimmers with 16,5±2,7 years and 67,7±13,5kg were subjected to drag force (Fr) estimated from: Fr=A x v2. Fr at maximal crawl velocity was divided to make up the four stages of test, with exhaustion times between 3-20min. Critical velocity (vcrit) was calculated from distance between 200-1500m. Power delivered from tethered-crawl (PTethCrit),
velocity and distance were fitted to time to exhaustion by linear and hyperbolic functions. The linear (81,9w) and non linear (71,1w) PTethCrit were not different (D 0,05) from the values of linear (108,2w) and non linear (96,3w) Pcrit estimates taken from linear (1,2m/s) and non linear
(1,14m/s) vcrit through swimming performance equations. We come to the conclusion that PTethCrit was related to vcrit, and is a reliable index of aerobic capacity.
Author Biographies
Dalton Müller Pessôa Filho
Professor assistente II – Departamento de Educação Física, Faculdade de Ciências – Universidade
Estadual Paulista (Unesp)/Bauru (SP)
E-mail: dmpf@fc.unesp.br
Elvancir Pereira do nascimento
Professor especialista – Secretaria Municipal de Esporte de Presidente Prudente e Universidade do
Oeste Paulista (Unoeste)/Presidente Prudente (SP)
E-mail: pepe@unoeste.br
Benedito Sérgio Denadai
Professor titular – Laboratório de Avaliação da Performance Humana, Instituto de Biociência –
Universidade Estadual Paulista (Unesp)/Rio Claro (SP)
E-mail: bdenadai@rc.unesp.br
