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Insufficient ventilation as a cause of impaired pulmonary gas exchange during submaximal exercise
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. (Nationellt Vintersportcentrum / Swedish Winter Sports Research Centre)ORCID iD: 0000-0002-3814-6246
Responsible organisation
2007 (English)In: Respiratory Physiology & Neurobiology, ISSN 1569-9048, E-ISSN 1878-1519, Vol. 157, no 2-3, 348-59 p.Article in journal (Refereed) Published
Abstract [en]

Pulmonary ventilation and gas exchange were determined during prolonged skiing (approximately 76% of V(O2, max); cardiac output=26-27 L min(-1)) using diagonal technique (DIA) for 40 min followed by 10 min of double poling (DPOL) and 10 min of leg skiing (LEG). Exercise caused approximately 2-5% reduction of arterial oxygen saturation Sa(O2). For a given cardiac output and V(O2), DPOL presented higher V(E), lower Pa(CO2) and a more efficient pulmonary gas exchange, revealed by higher PA(O2) and Pa(O2) and lower A-aD(O2). The A-aD(O2) widened 2 mmHg L(-1) of cardiac output increase. However, for a given cardiac output and V(O2), exercise mode had an important influence on pulmonary ventilation and gas exchange. Highly trained cross-country skiers' present about 2 units reduction in Sa(O2) from resting values during submaximal exercise at 76% of V(O2, max). Half of the reduction in saturation is accounted for by the rightward-shift of the oxygen dissociation curve of the haemoglobin. The exercise duration has almost no repercussion on pulmonary gas exchange in these athletes, with the small effect on Sa(O2) associated to the increase in body core temperature.

Place, publisher, year, edition, pages
2007. Vol. 157, no 2-3, 348-59 p.
Keyword [en]
Desaturation, Elite, Fatigue, Lung, Performance
Keyword [sv]
Idrottsvetenskap
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:miun:diva-4593DOI: 10.1016/j.resp.2006.12.013ISI: 000247713300019PubMedID: 17303477Scopus ID: 2-s2.0-34248683240Local ID: 5512OAI: oai:DiVA.org:miun-4593DiVA: diva2:29625
Available from: 2008-09-30 Created: 2009-06-07 Last updated: 2016-10-05Bibliographically approved

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CiteExportLink to record
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Citation style
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