Determinação do máximo déficit acumulado de oxigênio de nadadores por meio da técnica de retro extrapolação

• Autor(a) principal: Campos, Eduardo Zapaterra [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/132766; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/15-12-2015/000855952.pdf
• topic: Swimming; Natação; Capacidade anaeróbica; Oxigênio - Transporte fisiológico

Due to the need to optmize the methods of anaerobic capacity determination, the aim of the present doctor thesis was validate the evaluation of accumulated oxygen deficit (AOD) by the backward extrapolation technique (AODRED). For this, 25 swimmers were evaluated and four scientific works were developed. The first study aimed to compare VO2Peak and sVO2Peak of swimmers obtained after a maximal 400 m effort and free-swimming incremental test. Eleven swimmers performed a maximal 400m effort and an incremental protocol to determine both variables. Besides no difference between VO2Peak (3.86 ± 0.85 L∙min-1 vs. 4.09 ± 0.93 L∙min-1), the sVO2Peak 1.39 ± 0.12 m∙s-1 vs. 1.34 ± 0.13 m∙s-1) was higher in the incremental test. The second study aumed compare AODRED (i.e. sum of lactic and alactic metabolism) with the AOD after a maximal 400m effort. The AOD was considered as the difference between theoretical demand (TD) and aerobic contribution (Aer), while AODRED was evaluated by the sum of anaerobic metabolisms. No difference between AOD (3.29 ± 1.34 LO2) and AODRED (3.24 ± 1.56 L O2), significant correlation (r = 0.95), and low mean standard estimative error (0.04 L) were found between the methodologies. Since no difference was found, the third study aimed to verify the possibility to estimate Aer only by the use of AODRED. Six swimmers were submitted to a maximal 400m effort with snorkel. The Aer estimated by the rectangular demand (i.e. VO2Peak·effort time; AerRD) was not different from Aer (10.36 ± 1.56 L vs. 10.31 ± 1.48 L), and presented low mean error (-0.15 L). Thus, since AODRED is determined by peak lactate concentration and off transient oxygen kinetics, it would be possible the AODRED by the backward extrapolation technique. Thus, the forth study aimed to test the reliability and validity of free-swimming AODRED (i.e. backward extrapolation). For this, eight swimmers performed two 400m efforts without snorkel ...