Autor 
Neder, J. A.
Nery, L. E. Andreoni, S. Sachs, A. Whipp, B. J. 
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 O2 and leg mass (LM) and total body mass (TBM) in 71 randomlyselected 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 O2, gross efficiency, and work efficiency were related to TBM and LM as assessed by dual energy xray absorptiometry. We found that gross (V)over dot O2, 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 O2/TBM were found in subjects with large LM/TBM ratios and viceverse; (V)over dot O2/LM, however, did not change with anthropometric characteristics. Gross (V)over dot O2 (mL/min) was predicted by a LMbased 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 TBMbased 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 xray absorptiometry body composition 
Idioma  Inglês 
Data  20000501 
Publicado em  International Journal of Sports Medicine. Stuttgart: Georg Thieme Verlag, v. 21, n. 4, p. 263269, 2000. 
ISSN  01724622 (Sherpa/Romeo, fator de impacto) 
Editor  Georg Thieme Verlag 
Extensão  263269 
Fonte 

Direito de acesso  Acesso restrito 
Tipo  Artigo 
Web of Science  WOS:000087100600005 
URI  http://repositorio.unifesp.br/handle/11600/26310 
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