Title |
Coupling of dyspnea perception and occurrence of tachypnea during exercise
|
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Published in |
The Journal of Physiological Sciences, April 2016
|
DOI | 10.1007/s12576-016-0452-5 |
Pubmed ID | |
Authors |
Setsuro Tsukada, Yuri Masaoka, Akira Yoshikawa, Keiji Okamoto, Ikuo Homma, Masahiko Izumizaki |
Abstract |
During exercise, tidal volume initially contributes to ventilatory responses more than respiratory frequency, and respiratory frequency then increases rapidly while tidal volume stabilizes. Dyspnea intensity is also known to increase in a threshold-like manner. We tested the possibility that the threshold of tachypneic breathing is equal to that of dyspnea perception during cycle ergometer exercise (n = 27). Dyspnea intensity was scored by a visual analog scale. Thresholds were expressed as values of pulmonary O2 uptake at each breakpoint. Dyspnea intensity and respiratory frequency started increasing rapidly once the intensity of stimuli exceeded a threshold level. The thresholds for dyspnea intensity and for occurrence of tachypnea were significantly correlated. An intraclass correlation coefficient of 0.71 and narrow limits of agreement on the Bland-Altman plot indicated a good agreement between these thresholds. These results suggest that the start of tachypneic breathing coincides with the threshold for dyspnea intensity during cycle ergometer exercise. |
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Country | Count | As % |
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United Kingdom | 3 | 33% |
Australia | 1 | 11% |
Comoros | 1 | 11% |
Taiwan | 1 | 11% |
Unknown | 3 | 33% |
Demographic breakdown
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Members of the public | 6 | 67% |
Scientists | 2 | 22% |
Practitioners (doctors, other healthcare professionals) | 1 | 11% |
Mendeley readers
Geographical breakdown
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Demographic breakdown
Readers by professional status | Count | As % |
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Student > Doctoral Student | 1 | 7% |
Student > Bachelor | 1 | 7% |
Student > Master | 1 | 7% |
Professor > Associate Professor | 1 | 7% |
Other | 1 | 7% |
Unknown | 7 | 47% |
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Sports and Recreations | 3 | 20% |
Medicine and Dentistry | 3 | 20% |
Unknown | 6 | 40% |