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Exergy performance of human body under physical activities

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Tipo de produção

Artigo

Data de publicação

2013

Texto completo (DOI)

Periódico

Energy

Editor

Citações na Scopus

42

Autores

Mady C.E.K.
Albuquerque C.
Fernandes T.L.
Hernandez A.J.
Saldiva P.H.N.
Yanagihara J.I.
de Oliveira S.

Orientadores

Resumo

The aim of this work is to apply performance indicators for individuals under physical activity based on the concepts of exergy destroyed and exergy efficiency. The cardiopulmonary exercise test is one of the most used tests to assess the functional capacity of individuals with varying degrees of physical training. To perform the exergy analysis during the test, it is necessary to calculate heat and mass flow rates, associated with radiation, convection, vaporization and respiration, determined from the measurements and some relations found in the literature. The energy balance allowed the determination of the internal temperature over time and the exergy variation of the body along the experiment. Eventually, it was possible to calculate the destroyed exergy and the exergy efficiency from the exergy analysis. The exergy rates and flow rates are dependent of the exercise level and the body metabolism. The results show that the relation between the destroyed exergy and the metabolism is almost constant during the test, furthermore its value has a great dependence of the subject age. From the exergy analysis it was possible to divide the subjects according to their training level, for the same destroyed exergy, subjects with higher lactate threshold can perform more work. © 2013 Elsevier Ltd.

Citação

MADY, C. E. K.; Albuquerque, C.; FERNANDES, T. L.; HERNANDEZ, A. J.; YANAGIHARA, J. I.; SALDIVA, P.; OLIVEIRA JR., S.. Exergy performance of human body under physical activities. Energy (Oxford), v. 62, p. 370-378, 2013.

Palavras-chave

Keywords

Aerobic threshold; Exergy analysis; Exergy efficiency; Treadmill running

Assuntos Scopus

Aerobic thresholds; Exergy Analysis; Exergy efficiencies; Functional capacity; Internal temperature; Performance indicators; Physical activity; Physical training

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Avaliação

Revisão

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