Inspiratory resistive loading after all-out exercise improves subsequent performance

Inspiratory resistive loading after all-out exercise improves subsequent performance

Author Chiappa, Gaspar R. Google Scholar
Ribeiro, Jorge P. Google Scholar
Alves, Cristiano N. Google Scholar
Vieira, Paulo J. C. Google Scholar
Dubas, Joao Autor UNIFESP Google Scholar
Queiroga, Fernando Autor UNIFESP Google Scholar
Batista, Laura D. Autor UNIFESP Google Scholar
Silva, Antonio C. Autor UNIFESP Google Scholar
Neder, J. Alberto Autor UNIFESP Google Scholar
Institution Hosp Clin Porto Alegre
Univ Fed Rio Grande do Sul
Universidade Federal de São Paulo (UNIFESP)
Abstract We have previously shown that post-exercise inspiratory resistive loading (IRL) reduces blood lactate ([Lac (b) (-) ]). in this study, we tested the hypothesis that IRL during recovery could improve subsequent exercise performance. Eight healthy men underwent, on different days, two sequential 30-s, cycle ergometer Wingate tests. During the 10-min recovery period from test 1, subjects breathed freely or through an inspiratory resistance (15 cm H(2)O) with passive leg recovery. Arterialized [Lac (b) (-) ] values, perceptual scores (Borg), cardiac output by impedance cardiography (QT), and changes in the deoxygenation status of the M. vastus lateralis by near-infrared spectroscopy (Delta HHb), were recorded. [Lac (b) (-) ] was significantly reduced after 4 min of recovery with IRL (peak [Lac (b) (-) ] 12.5 +/- A 2.3 mmol l(-1) with free-breathing vs. 9.8 +/- A 1.5 mmol l(-1) with IRL). Effort perception was reduced during late recovery with IRL compared with free-breathing. Cardiac work was increased with IRL, since heart rate and QT were elevated during late recovery. Peripheral muscle reoxygenation, however, was significantly impaired with IRL, suggesting that post-exercise convective O(2) delivery to the lower limbs was reduced. Importantly, IRL had a dual effect on subsequent performance, i.e., improvement in peak and mean power, but increased fatigue index (P < 0.05). Our data demonstrate that IRL after a Wingate test reduces post-exercise effort perception and improves peak power on subsequent all-out maximal-intensity exercise.
Keywords Respiratory muscles
Wingate test
Hemodynamics
Near-infrared spectroscopy
Lactate
Language English
Date 2009-05-01
Published in European Journal of Applied Physiology. New York: Springer, v. 106, n. 2, p. 297-303, 2009.
ISSN 1439-6319 (Sherpa/Romeo, impact factor)
Publisher Springer
Extent 297-303
Origin http://dx.doi.org/10.1007/s00421-009-1022-9
Access rights Closed access
Type Article
Web of Science ID WOS:000265694500015
URI http://repositorio.unifesp.br/handle/11600/31491

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