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What limits VO2max?: A symposium held at the BASES Conference, 6 September 2010
Swedish School of Sport and Health Sciences, GIH, Department of Sport and Health Sciences, Björn Ekblom's research group.ORCID iD: 0000-0002-4030-5437
2012 (English)In: Journal of Sports Sciences, ISSN 0264-0414, Vol. 30, no 6, 517-531 p.Article in journal (Refereed) Published
Abstract [en]

Three modern views about the factors limiting oxygen uptake in healthy humans are set against the original (early 1920s) concept of A. V. Hill and colleagues. The majority view for most of the intervening time has been that cardiac output is the essential limiting function. Among recent research in support of this contention is that, in quadrupeds, pericardiectomy, which allows greater diastolic filling, elevates maximum oxygen uptake; however, the relevance to bipedal exercise can be questioned. In any case, algebraic analyses of model systems indicate that all identifiable stages on the oxygen transport pathway, from pulmonary diffusion to oxidative phosphorylation in skeletal muscle mitochondria, materially influence maximum uptake. Thus, if a high cardiac output is to be of benefit, all the other steps must function better too. Nevertheless, these two viewpoints concur that the limit to maximum oxygen uptake is somatic. In contrast, there are strong indications that at altitudes where oxygen availability is about half that at sea level, cerebral oxygenation is a limiting factor, and some recent experiments raise the possibility that it might be a substantial influence at sea level also. Clearly, consensus cannot yet be reached on the question posed in the title.

Place, publisher, year, edition, pages
2012. Vol. 30, no 6, 517-531 p.
National Category
Medical and Health Sciences
Research subject
Medicine/Technology
Identifiers
URN: urn:nbn:se:gih:diva-2515DOI: 10.1080/02640414.2011.642809OAI: oai:DiVA.org:gih-2515DiVA: diva2:573494
Available from: 2012-11-30 Created: 2012-11-30 Last updated: 2017-03-31Bibliographically approved

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