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European Heart Journal 1982 3(2):93-99;
Copyright © 1982 by the European Society of Cardiology.
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© 1982 by The European Society of Cardiology

Physical and physiological work in treadmill testing compared with other types of ergometry

M. KALTENBACH*,, W. BISCHOFS*, R. HOPF* and D. BÖHMER{dagger}

*Departments of Cardiology, University of Frankfurt am Main West Germany
{dagger}Sports Medicine, University of Frankfurt am Main West Germany

Received 20 October 1980; revised 18 August 1981; .

Requests for reprints to: Prof. Dr M. Kaltenbach, Department of Cardiology, University of Frankfurt am Main, 6000 Frankfurt am Main 70, West Germany.

Abstract

(1) The objective of the study was to compare physiological work during exercise using treadmill, bicycle, and arm-assisted step tests.

(2) Twelve probands were stressed in randomized order on the three devices at workloads of 50, 100, 150, and 200 W. O2 uptake, heart rate, respiratory minute volume, and additional derived parameters were measured.

(3) Values obtained with the bicycle and arm-assisted step test accorded at all workloads; a linear relationship was observed between workload in watts and O2 uptake. For the treadmill, accuracy depended on the formula used for calculation of energy cost. At the 200 W level, the horizontally positioned treadmill required considerably more physiological work than calculated.

(4) It is concluded that comparison of different forms of exercise has to be done with caution particularly if the higher speeds of the treadmill (‘running’) are used.

(5) For practical ergometry, especially for exercise testing in elderly patients with suspected coronary heart disease, the arm-assisted step test is considered to be advantageous. This form of exercise can be applied even to people with handicapped legs; it avoids premature fatigue by involving a large muscle mass. It shows equal accuracy as compared to the more complicated forms of exercise.

Key Words: Treadmill • ergometry • physical work • O2-uptake


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