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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Exergy efficiency on incremental stationary bicycle test: A new indicator of exercise performance?

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Author(s):
Keutenedjian Mady, Carlos Eduardo [1] ; Igarashi, Tatiane Lie [2] ; Albuquerque, Cyro [2] ; Santos-Silva, Paulo Roberto [3] ; Fernandes, Tiago Lazzaretti [3] ; Hernandez, Arnaldo Jose [3]
Total Authors: 6
Affiliation:
[1] Univ Estadual Campinas, Sch Mech Engn, Mendeleyev St, 200 Cidade Univ, BR-13083970 Campinas, SP - Brazil
[2] Ctr Univ FEI, Dept Mech Engn, BR-09850901 Sao Bernardo Do Campo - Brazil
[3] Univ Sao Paulo, Sch Med, Sports Med Grp, Dept Orthoped & Traumatol, Sao Paulo, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of the Brazilian Society of Mechanical Sciences and Engineering; v. 41, n. 12 DEC 2019.
Web of Science Citations: 0
Abstract

The first and second laws of the thermodynamics were applied to the human body to evaluate the performance of subjects under different training levels. Ten cyclists were evaluated in the stationary bicycle with the indirect calorimetry analysis to obtain the metabolism on an energy and exergy basis. A distinguishing feature of this article is the evaluation of the exergy efficiency of the body with the knowledge of the real performed power and the internal temperature (measured tympanic temperature and calculated esophagus temperature). Regarding the skin temperature, an infrared camera was used to measure different parts of the body. Therefore, the phenomenological behavior of the body was assessed and used as a basis to apply the exergy analysis. Results indicate that the destroyed exergy can be an indicator of performance when compared with maximum oxygen consumption. Nevertheless, more experiments must be carried out to proper state if there is a correlation. Eventually, the exergy efficiency was calculated for all subjects, and its value was around 23 to 28%. (AU)

FAPESP's process: 15/22883-7 - Thermodynamics analysis applied to biological systems
Grantee:Carlos Eduardo Keutenedjian Mady
Support Opportunities: Regular Research Grants