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Oxygen uptake (V̇O2) kinetics in different species: a brief review

In: Comparative Exercise Physiology
Authors:
David C. Poole Departments of Kinesiology, Anatomy and Physiology, Kansas State University, 1600 Denison Avenue, Manhattan, KS 66506-5802, USA

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Casey A. Kindig Department of Medicine, University of California, San Diego, CA, USA

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Brad J. Behnke Department of Health and Kinesiology, Texas A&M University, College Station, TX, USA

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Andrew M. Jones Department of Exercise and Sport Science, Manchester Metropolitan University, Manchester, UK

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Online Publication Date:
01 Feb 2005

Abstract

When a human begins to move or locomote, the energetic demands of its skeletal muscles increase abruptly and the oxygen (O2) transport system responds to deliver increased amounts of O2 to the respiring mitochondria. It is intuitively reasonable that the rapidity with which O2 transport can be increased to and utilized by (V̇O2) the contracting muscles would be greater in those species with a higher maximal V̇O2 capacity (i.e., V̇O2max). This review explores the relationship between V̇O2max and V̇O2 dynamics or kinetics at across a range of species selected, in part, for their disparate V̇O2max capacities. In healthy humans there is compelling evidence that the speed of the V̇O2 kinetics at the onset of exercise is limited by an oxidative enzyme inertia within the exercising muscles rather than by O2 delivery to those muscles. This appears true also for the horse and dog but possibly not for a certain species of frog. Whereas there is a significant correlation between V̇O2max and the speed of V̇O2 kinetics among different species, it is possible to identify species or individuals within a species that exhibit widely disparate massspecific V̇O2max capacities but similar V̇O2 kinetics (i.e., superlative human athlete and horse).

Title:
Oxygen uptake (V̇O2) kinetics in different species: a brief review
Article Type:
Research Article
DOI:
https://doi.org/10.1079/ECP200445
Language:
English
Pages:
1–15
Keywords:
maximal oxygen uptake; oxygen uptake dynamics; exercise; muscle contractions
In:
Comparative Exercise Physiology
In:
Volume 2: Issue 1
Received:
03 Sep 2004
Accepted:
29 Oct 2004
Publisher:
Wageningen Academic
E-ISSN:
1755-2559
Print ISSN:
1755-2540
Subjects:
General, Life Sciences, Food & Health, Animal & Veterinary

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