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Investigations of exercise adaptation of the cardiovascular system in pilots breathing an oxygen-poor gas mixture. Part I. Analysis of haemodynamic parameters

Mazurek, K.

Acta Physiologica Polonica 34(3): 277-283

1983

ISSN/ISBN: 0044-6033
PMID: 6675427
Document Number: 217135
The author studied exercise adaptation of the cardiovascular system in pilots breathing a gas mixture containing 12% of oxygen in nitrogen. During hypoxia the following findings were obtained: earlier achieving of the assumed peak value of heart rate, lower value of diastolic arterial blood pressure and peripheral vascular resistance. Hypoxia modified the exercise tolerance decreasing the maximal power and sum of the performed work. Differences in the adaptation response of the cardiovascular system depended on the fitness level of the pilots. Those with a high fitness level performed greater work at stable heart rates and had higher exercise tolerance during hypoxia. The exercise test in hypoxia related to the haemodynamic parameters increases significantly the scope of information about the efficiency of the cardiovascular system.

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