Influence of inspiratory resistance on performance during graded exercise tests on a cycle ergometer

Applied Ergonomics
R HeusGerard Swenker

Abstract

Due to more stringent requirements to protect personnel against hazardous gasses, the inspiratory resistance of the present generation of respiratory protective devices tends to increase. Therefore an important question is to what extent inspiratory resistance may increase without giving problems during physical work. In this study the effects of three levels (0.24; 1.4 and 8.3 kPa s l(-1)) of inspiratory resistance were tested on maximal voluntary performance. Nine male subjects performed a graded exercise test on a cycle ergometer with and without these three levels of inspiratory resistance. Oxygen consumption, heart rate, time to exhaustion and external work were measured. The results of these experiments showed that increasing inspiratory resistance led to a reduction of time to exhaustion (TTE) on a graded exercise test(GXT). Without inspiratory resistance the mean TTE was 11.9 min, the three levels of resistance gave the following mean TTE's: 10.7, 7.8 and 2.7 min. This study showed that TTE on a GXT can be predicted when physical fitness (VO2-max) of the subject and inspiratory resistance are known. The metabolic rate of the subjects was higher with inspiratory resistance, but no differences were found between the three...Continue Reading

References

Jan 1, 1990·European Journal of Applied Physiology and Occupational Physiology·M JettéS Livingstone
Oct 1, 1973·Archives of Environmental Health·R A BentleyK F Sweetland
Sep 1, 1984·American Industrial Hygiene Association Journal·P HarberM Barber
Aug 1, 1981·American Industrial Hygiene Association Journal·N S DenoD M Kiser

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Citations

Mar 12, 2003·Applied Ergonomics·E A den Hartog, R Heus
Nov 8, 2017·High Altitude Medicine & Biology·Yongsuk SeoJung-Hyun Kim
Sep 27, 2016·Industrial Health·Yang Yang, Albert Ping-Chuen Chan
Feb 9, 2021·Temperature : Multidisciplinary Biomedical Journal·Hein DaanenPeter Van den Hazel

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