Could the pulmonary V˙O2 off-transient response to maximal short-term exercise be better characterized by a triexponential decay?

Rogério Santos de Oliveira Cruz; Tiago Turnes; Rafael Alves de Aguiar; Fabrizio Caputo

doi:10.1016/j.resp.2016.10.003

Could the pulmonary V˙O₂ off-transient response to maximal short-term exercise be better characterized by a triexponential decay?

Respir Physiol Neurobiol. 2017 Jan:235:83-87. doi: 10.1016/j.resp.2016.10.003. Epub 2016 Oct 12.

Authors

Rogério Santos de Oliveira Cruz¹, Tiago Turnes², Rafael Alves de Aguiar², Fabrizio Caputo²

Affiliations

¹ Human Performance Research Group, College of Health and Sport Science, Santa Catarina State University, Florianópolis, Brazil. Electronic address: cruz.rso@gmail.com.
² Human Performance Research Group, College of Health and Sport Science, Santa Catarina State University, Florianópolis, Brazil.

PMID: 27743811
DOI: 10.1016/j.resp.2016.10.003

Abstract

The off-transient pulmonary oxygen uptake (V˙O₂) response to a single bout of intense, exhaustive exercise has been characterized over the years by a second-order exponential model. In this paper, we report the superiority of a third-order exponential decay in describing the V˙O₂ off-kinetics after a maximal cycling exercise lasting 60-s. Our findings are in accordance with a biphasic pattern of phosphocreatine resynthesis when muscle pH is affected.

Keywords: Body O(2) stores; Fast component; Oxygen uptake; PCr hydrolysis and restoration; Performance; Recovery kinetics.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adult
Bicycling / physiology
Exercise / physiology*
Humans
Hydrogen-Ion Concentration
Kinetics
Lactic Acid / blood
Male
Models, Biological*
Models, Statistical*
Muscle, Skeletal / metabolism
Oxygen Consumption / physiology*
Phosphocreatine / metabolism
Pulmonary Gas Exchange / physiology*

Substances

Phosphocreatine
Lactic Acid