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01-02-2010 | Original Article

Restoration of blood pH between repeated bouts of high-intensity exercise: effects of various active-recovery protocols

Authors: Juan Del Coso, Nassim Hamouti, Roberto Aguado-Jimenez, Ricardo Mora-Rodriguez

Published in: European Journal of Applied Physiology | Issue 3/2010

Abstract

To determine which active-recovery protocol would reduce faster the high blood H⁺ and lactate concentrations produced by repeated bouts of high-intensity exercise (HIE). On three occasions, 11 moderately trained males performed 4 bouts (1.5 min) at 163% of their respiratory compensation threshold (RCT) interspersed with active-recovery: (1) 4.5 min pedalling at 24% RCT (S_HORT); (2) 6 min at 18% RCT (M_EDIUM); (3) 9 min at 12% RCT (L_ONG). The total work completed during recovery was the same in all three trials. Respiratory gases and arterialized-blood samples were obtained during exercise. At the end of exercise, L_ONG in comparison to S_HORT and M_EDIUM increased plasma pH (7.32 ± 0.02 vs. ~7.22 ± 0.03; P < 0.05), while reduced lactate concentration (8.5 ± 0.9 vs. ~10.9 ± 0.8 mM; P < 0.05). Ventilatory equivalent for CO₂ was higher in L_ONG than S_HORT and M_EDIUM (31.4 ± 0.5 vs. ~29.6 ± 0.5; P < 0.05). Low-intensity prolonged recovery between repeated bouts of HIE maximized H⁺ and lactate removal likely by enhancing CO₂ unloading.

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Title: Restoration of blood pH between repeated bouts of high-intensity exercise: effects of various active-recovery protocols
Authors: Juan Del Coso
Nassim Hamouti
Roberto Aguado-Jimenez
Ricardo Mora-Rodriguez
Publication date: 01-02-2010
Publisher: Springer-Verlag
Published in: European Journal of Applied Physiology / Issue 3/2010
Print ISSN: 1439-6319
Electronic ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-009-1248-6

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Restoration of blood pH between repeated bouts of high-intensity exercise: effects of various active-recovery protocols

Abstract

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