Determination of accumulated oxygen deficit during a 400M run

• Tipo: Artigo em Revista Científica Internacional
• Data: 2004

Autores

reis, vm (Autor) Outra; duarte, ja (Autor) FADEUP; espírito-santo, j (Autor) Outra; russell, ap (Autor) Outra

Revista

Título: Journal of Exercise Physiology Online

Vol. 7

Páginas: 77-83

ISSN: 1097-9751

Editora: American Society of Exercise Physiologists

Indexação

ISI Web of Knowledge

Scopus - 15 Citações

Outras Informações

ID Authenticus: P-007-DJY

Abstract (EN): We studied ten male athletes performing a 400 m all-out track run in order to measure the accumulated O2 deficit (AOD), the energy cost of running (Cr) and the percentage anaerobic contribution to total energy release (EAN). Prior to the 400 m run, subjects underwent several five min constant intensity running bouts between 50% and 100% VO 2max to establish the individual VO2-speed relationship. Oxygen uptake was measured with a portable analyser (Cortex Metamax I). During the 400 m all-out track run estimated AOD, Cr and EAN were 60.75 ± 6.25 mL O2 Eq/kg, 0.200 ± 0.014 mL O 2 Eq/kg/m and 75.9 ± 5.5%. The mean 400 m speed was 7.43 ± 0.32 m/s. Oxygen uptake during the 400 m run reached ~52% of subjects' peak VO2. Unlike many laboratory measures of the AOD, the field-based estimations of the AOD in the present study did not correlate with 400 m speed. The main findings of this study were that during high-intensity track running for less than 1 min, the AOD and EAN are relatively high while the VO2 is low. These results highlight the need for testing the respiratory response during high-intensity running in field, rather than under laboratory conditions, particularly when testing sprint runners.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7