Influence of Cycling History on the Ventilatory Response to Cycle-Ergometry in Humans: A Role for Respiratory Memory?

Andrew J. Cathcart, Brian J. Whipp, Anthony P. Turner, John Wilson, Susan A. Ward

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The ventilatory (V' E) mechanisms subserving stability of alveolar and arterial PCO2 (PACO2, PaCO2) during moderate exercise (< lactate threshold, theta L) remain controversial. As long-term modulation has been argued to be an important contributor to this control process, we proposed that subjects with no experience of cycling (NEx) might provide insight into this issue. With no exercise familiarization, 9 sedentary NEx subjects and 9 age-, sex-, and activity-matched controls (C) who had cycled regularly for recreational purposes since childhood completed a square-wave (6-min stage) cycle-ergometry test: 10 W-WR1-WR2-WR1-10 W; WR1 range 25-45 W, WR2 range 50-90 W. WRs were subsequently confirmed to <theta L. The NEx V'E-V'CO2 slope, V'E-intercept, mean PACO2 and estimated alveolar ventilation were not different from C. In conclusion, these findings provide no support for, and possibly support for no, V'E control during moderate exercise being modulated by influences related to long-term exercise history.

Original languageEnglish
Title of host publicationNEW FRONTIERS IN RESPIRATORY CONTROL
EditorsI Homma, H Onimaru, Y Fukuchi
Place of PublicationBERLIN
PublisherSpringer-Verlag GmbH
Pages311-314
Number of pages4
ISBN (Print)978-1-4419-5691-0
DOIs
Publication statusPublished - 2010
Event11th Oxford Conference on Modeling and Control of Breathing - Nara
Duration: 23 Jul 200926 Jul 2009

Publication series

NameAdvances in Experimental Medicine and Biology

Conference

Conference11th Oxford Conference on Modeling and Control of Breathing
CityNara
Period23/07/0926/07/09

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