An examination of exercise mode on ventilatory patterns during incremental exercise

Elliott, Adrian D. and Grace, Fergal (2010) An examination of exercise mode on ventilatory patterns during incremental exercise. European Journal of Applied Physiology, 110(3), pp. 557-562. ISSN (print) 1439-6319

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Both cycle ergometry and treadmill exercise are commonly employed to examine the cardiopulmonary system under conditions of precisely controlled metabolic stress. Although both forms of exercise are effective in elucidating a maximal stress response, it is unclear whether breathing strategies or ventilator efficiency differences exist between exercise modes. The present study examines breathing strategies, ventilatory efficiency and ventilatory capacity during both incremental cycling and treadmill exercise to volitional exhaustion. Subjects (n = 9) underwent standard spirometric assessment followed by maximal cardiopulmonary exercise testing utilising cycle ergometry and treadmill exercise using a randomised cross-over design. Respiratory gases and volumes were recorded continuously using an online gas analysis system. Cycling exercise utilised a greater portion of ventilatory capacity and higher tidal volume at comparable levels of ventilation. In addition, there was an increased mean inspiratory flow rate at all levels of ventilation during cycle exercise, in the absence of any difference in inspiratory timing. Exercising [Formula: see text] slope and the lowest [Formula: see text] value, was lower during cycling exercise than during the treadmill protocol indicating greater ventilatory efficiency. The present study identifies differing breathing strategies employed during cycling and treadmill exercise in young, trained individuals. Exercise mode should be accounted for when assessing breathing patterns and/or ventilatory efficiency during incremental exercise.

Item Type: Article
Uncontrolled Keywords: cardiopulmonary testing, ventilatory efficiency, breathing patterns, v-e versus vco2 slope, breathing pattern, gas-exchange, maximal exercise, heart-failure, efficiency, entrainment, movement, cyclists, capacity, drive
Research Area: Sports-related studies
Biological sciences
Faculty, School or Research Centre: Faculty of Science (until 2011) > School of Life Sciences
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Depositing User: Automatic Import Agent
Date Deposited: 21 Jun 2010 08:25
Last Modified: 25 Oct 2010 13:03

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