The effect of altitude and intensity of physical activity on the exergy efficiency of respiratory system

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dc.contributor.authorHenriques I.B.
dc.contributor.authorMady C.E.K.
dc.contributor.authorAlbuquerque Neto C.
dc.contributor.authorYanagihara J.I.
dc.contributor.authorOliveira S.
dc.date.accessioned2019-08-20T00:13:11Z
dc.date.available2019-08-20T00:13:11Z
dc.date.issued2014
dc.description.abstractThe effect of altitude on exercise performance of lowlanders has long been discussed, but it is still unclear whether the performance reduction is related to inefficiency of the respiratory system, body tissues or both. In the present work, exergy analysis was applied to the human body in order to compare its exergy efficiency under basal conditions and during physical activity at sea level and high altitudes for different periods of acclimatization. Two control volumes were analyzed: respiratory system and human body as a whole. Data concerning mass and energy balances of the body and respiratory system were obtained from models available in the literature, which were modified based on medical literature to simulate the responses to physical activity at high altitude for different periods of acclimatization. The results indicated that the respiratory system exergy efficiency is reduced at high altitudes and under physical activity, while exergy efficiency of the body increases for both parameters, which may indicate that the discomfort reported at high altitudes is mostly related to the respiratory system than to the other ones. Concerning the acclimatization period, its influence was more pronounced on the respiratory system.
dc.description.firstpage265
dc.description.issuenumber4
dc.description.lastpage273
dc.description.volume17
dc.identifier.citationHENRIQUES, I. B.; MADY, CARLOS EDUARDO KEUTENEDJIAN; ALBUQUERQUE, Cyro; YANAGIHARA, J. I.; OLIVEIRA JUNIOR, SILVIO. The effect of altitude and intensity of physical activity on the exergy efficiency of respiratory system. International Journal of Thermodynamics, v. 17, n. 4, p. 265-273, 2014.
dc.identifier.doi10.5541/ijot.550
dc.identifier.issn1301-9724
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/1947
dc.relation.ispartofInternational Journal of Thermodynamics
dc.rightsAcesso Restrito
dc.subject.otherlanguageAltitude
dc.subject.otherlanguageExergy analysis
dc.subject.otherlanguageExergy efficiency
dc.subject.otherlanguagePhysical activity
dc.subject.otherlanguageRespiratory system
dc.titleThe effect of altitude and intensity of physical activity on the exergy efficiency of respiratory system
dc.typeArtigo
fei.scopus.citations19
fei.scopus.eid2-s2.0-84918815944
fei.scopus.subjectAltitude
fei.scopus.subjectBasal conditions
fei.scopus.subjectExergy Analysis
fei.scopus.subjectExergy efficiencies
fei.scopus.subjectMass and energy balance
fei.scopus.subjectMedical literatures
fei.scopus.subjectPhysical activity
fei.scopus.subjectTwo-control-volume
fei.scopus.updated2024-03-04
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84918815944&origin=inward
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