Blood lactate during recovery from intense exercise: Impact of inspiratory loading

Página do item simplificado
dc.contributor.authorChiappa, Gaspar R.
dc.contributor.authorRoseguini, Bruno T.
dc.contributor.authorAlves, Cristiano N.
dc.contributor.authorFerlin, Elton L.
dc.contributor.authorNeder, Jose Alberto [UNIFESP]
dc.contributor.authorRibeiro, Jorge P.
dc.contributor.institutionHosp Clin Porto Alegre
dc.contributor.institutionUniv Fed Rio Grande do Sul
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.date.accessioned2016-01-24T13:49:19Z
dc.date.available2016-01-24T13:49:19Z
dc.date.issued2008-01-01
dc.description.abstractPurpose: It has long been suggested that inspiratory muscle activity may impact blood lactate levels ([Lac(-)](B)) during the recovery from dynamic exercise. in this study, we tested the hypothesis that inspiratory muscle activation during recovery from intense exercise would contribute to La- clearance, thus leading to reduced [Lac(-)](B.) Methods: Twelve healthy men underwent two maximal, incremental exercise tests on different days. During a 20-min inactive recovery period, they breathed freely or against a fixed inspiratory resistance of 15 cm H2O. During recovery, pulmonary gas exchange was continuously monitored, and serial samples of arterialized venous blood were obtained for [Lac(-)](B), pH, PCO2, and HCO3 (-), Results: Subjects presented similar ventilatory and gas-exchange responses at peak exercise during both experimental conditions. [Lac(-)](B) during recovery was reduced with inspiratory resistance (7.7 +/- 1 vs 10.4 +/- 1, 7.8 2 vs 10.3 +/- 2, and 7.3 +/- 1 vs 9.7 +/- 2 mM at 5, 7, and 9 min of recovery, respectively; P < 0.05), but no differences were found for blood acid-base status. Inspiratory resistance was associated with increased metabolic demand (VO2 and VCO2) but improved ventilatory efficiency, with lower V-E/[VCO2] and increased alveolar ventilation. Conclusion: These data are consistent with the notion that inspiratory muscles may be net consumers of lactate during recovery from intense exercise.en
dc.description.affiliationHosp Clin Porto Alegre, BR-90035007 Porto Alegre, RS, Brazil
dc.description.affiliationHosp Clin Porto Alegre, Exercise Pathophysiol Res Lab, Porto Alegre, RS, Brazil
dc.description.affiliationHosp Clin Porto Alegre, Div Cardiol, Porto Alegre, RS, Brazil
dc.description.affiliationUniv Fed Rio Grande do Sul, Fac Med, Dept Med, Porto Alegre, RS, Brazil
dc.description.affiliationUniversidade Federal de São Paulo, Resp Div, Pulm Function & Clin Exercise Physiol Unit, São Paulo, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo, Resp Div, Pulm Function & Clin Exercise Physiol Unit, São Paulo, Brazil
dc.description.sourceWeb of Science
dc.format.extent111-116
dc.identifierhttp://dx.doi.org/10.1249/mss.0b013e3181591de1
dc.identifier.citationMedicine and Science in Sports and Exercise. Philadelphia: Lippincott Williams & Wilkins, v. 40, n. 1, p. 111-116, 2008.
dc.identifier.doi10.1249/mss.0b013e3181591de1
dc.identifier.issn0195-9131
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/30244
dc.identifier.wosWOS:000251870900016
dc.language.isoeng
dc.publisherLippincott Williams & Wilkins
dc.relation.ispartofMedicine and Science in Sports and Exercise
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectlactate metabolismen
dc.subjectexcess postexercise oxygen consumptionen
dc.subjectinspiratory musclesen
dc.subjectwork of breathingen
dc.titleBlood lactate during recovery from intense exercise: Impact of inspiratory loadingen
dc.typeinfo:eu-repo/semantics/article
Arquivos
Coleções
Em verificação - Geral