Summary
The influence of the degree of coupling between the breathing and cycling rhythms (K) on oxygen uptake \(\dot V_{O_2 } \) was examined in 30 volunteers. They cycled on an ergometer with a load equal to 50% of their work capacity 170 in two experimental runs with spontaneous breathing rhythm, and in a further two runs with acoustically triggered breathing. K was continuously ascertained. \(\dot V_{O_2 } \) and other respiratory parameters were measured by an automatic “breath-by-breath analysis” system.
In 16 subjects, \(\dot V_{O_2 } \)-differences between runs were correlated with the differences in K. In the majority of these subjects (12), \(\dot V_{O_2 } \) decreased significantly with increasing K. In 14 subjects, \(\dot V_{O_2 } \) -and K-variations within individual runs were analyzed. Phases with higher K were regularly accompanied by a decrease in \(\dot V_{O_2 } \).
It is concluded that coupling the breathing and cycling rhythms reduces \(\dot V_{O_2 } \) for a given moderate work load, although the magnitude of the \(\dot V_{O_2 } \)-reduction varies considerably between individuals.
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Garlando, F., Kohl, J., Koller, E.A. et al. Effect of coupling the breathing- and cycling rhythms on oxygen uptake during bicycle ergometry. Europ. J. Appl. Physiol. 54, 497–501 (1985). https://doi.org/10.1007/BF00422959
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DOI: https://doi.org/10.1007/BF00422959