title: Relationships between V̇O2 and blood lactate responses after all-out running exercise.
abstract: To verify the effects of training status and blood lactate concentration (BLC) responses on the early excess postexercise oxygen consumption (EPOC), 8 sprinters, 7 endurance runners, and 7 untrained subjects performed an incremental test to determine maximal oxygen uptake and a 1-min all-out test to determine BLC and oxygen uptake recovery curves. BLC kinetics was evaluated to assess the quantity of lactate accumulated during exercise (QlaA), lactate removal ability (k2), and quantity of lactate removed from 0 to 10 min postexercise (QlaR). Oxygen uptake off-kinetics was evaluated to assess the decay time constants (τ1 and τ2); moreover, EPOC was measured during the first 10 min after exercise. While sprinters had 98%-100% and 94%-100% likelihood of having the highest EPOC and decay time constants, endurance runners had 98%-100% and 95%-100% likelihood of having the lowest EPOC and decay time constants. EPOC was correlated with QlaA (r = 0.74) and QlaR (r = 0.61). τ1 and τ2 were correlated with maximal oxygen uptake (r > -0.57), k2 (r > -0.48), and QlaR relative to QlaA (r > -0.60). Our findings indicate that oxygen uptake recovery is associated with fast lactate removal and aerobic training. Furthermore, the metabolites derived from anaerobic energy production seem to induce a greater EPOC after all-out exercise.
authors.affiliation: Human Performance Research Group, Santa Catarina State University, SC - Brasil.
authors.forename: Rafael Alves
authors.initials: RA
authors.lastname: de Aguiar
authors.forename: Rogério Santos de Oliveira
authors.initials: RS
authors.lastname: Cruz
authors.forename: Tiago
authors.initials: T
authors.lastname: Turnes
authors.forename: Kayo Leonardo
authors.initials: KL
authors.lastname: Pereira
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Caputo
mesh_terms: D000328:Adult; D000332:Aerobiosis; D054874:Athletic Performance / Q000502:physiology; D015444:Exercise / Q000502:physiology*; D006801:Humans; D019344:Lactic Acid / Q000097:blood*; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D012420:Running / Q000502:physiology*
chemical_list: D019344:Lactic Acid
keywords: EPOC; V̇O2 off-kinetics; anaerobic exercise; cinétique du lactate; cinétique indépendante du V̇O2; coureurs d’endurance; endurance runners; exercice anaérobie; lactate kinetics; sprinters; sprinteurs