Oxygen cost for cycling as related to leg mass in males and females, aged 20 to 80

Oxygen cost for cycling as related to leg mass in males and females, aged 20 to 80

Autor Neder, J. A. Google Scholar
Nery, L. E. Google Scholar
Andreoni, S. Google Scholar
Sachs, A. Google Scholar
Whipp, B. J. Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Univ London St Georges Hosp
Resumo In order to evaluate the determinants of the metabolic cost for cycle ergometry, we analyzed the relationship between (V)over dot O-2 and leg mass (LM) and total body mass (TBM) in 71 randomly-selected sedentary subjects (34 men), aged 20 to 80. Participants performed constant work rate (WR) tests at 0, 25, and 50 W (at 60 rpm) for 6 minutes in a randomized sequence: gross (V)over dot O-2, gross efficiency, and work efficiency were related to TBM and LM as assessed by dual energy x-ray absorptiometry. We found that gross (V)over dot O-2, and gross efficiency were more strongly related to LM than TBM but work efficiency values were independent of both (P > 0.05), Significantly higher values of (V)over dot O-2/TBM were found in subjects with large LM/TBM ratios and vice-verse; (V)over dot O-2/LM, however, did not change with anthropometric characteristics. Gross (V)over dot O-2 (mL/min) was predicted by a LM-based equation (10.6 [WR, W] + 16.8 [LM, kg] +75) with a mean error below 5%: this equation predicted the cost more accurately than previous TBM-based formulations (P < 0.01). We conclude that leg mass actually provides the preferred frame of reference for predicting the oxygen cost for cycle ergometry at 60 rpm in sedentary subjects, independent of age or gender.
Assunto oxygen uptake
cycle ergometry
work efficiency
dual energy x-ray absorptiometry
body composition
Idioma Inglês
Data 2000-05-01
Publicado em International Journal of Sports Medicine. Stuttgart: Georg Thieme Verlag, v. 21, n. 4, p. 263-269, 2000.
ISSN 0172-4622 (Sherpa/Romeo, fator de impacto)
Editor Georg Thieme Verlag
Extensão 263-269
Fonte http://dx.doi.org/10.1055/s-2000-8885
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000087100600005
URI http://repositorio.unifesp.br/handle/11600/26310

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