Could the pulmonary V˙O
2 off-transient response to maximal short-term exercise be better characterized by a triexponential decay?
Respir Physiol Neurobiol 2016;
235:83-87. [PMID:
27743811 DOI:
10.1016/j.resp.2016.10.003]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 10/06/2016] [Accepted: 10/09/2016] [Indexed: 11/16/2022]
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.
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