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Comparison of supine and sitting body position during a triangular exercise test

I. Experiences in healthy subjects

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Summary

A comparison of haemodynamic parameters is performed during a triangular exercise test on bicycle ergometer in respect of studying the influence of supine and sitting body position.

At the maximal symptom-limited work load reached the heart rate is on the average 9.2% higher, the arterial systolic pressure 16.1% and the cardiac output 17.2% less in the sitting body position (P<0.001).

On the opposite the pulmonary artery pressure during work is of slightly but not significantly higher level in the sitting position than in the supine. This phenomenon is explained by a prevailing of the beta-adrenergic tonus in our untrained subjects, while total sympathetic stimulation seems to be comparable in both body positions.

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Kubicek, F., Gaul, G. Comparison of supine and sitting body position during a triangular exercise test. Europ. J. Appl. Physiol. 36, 275–283 (1977). https://doi.org/10.1007/BF00423053

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  • DOI: https://doi.org/10.1007/BF00423053

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