Consumo de oxigênio durante ciclismo na máxima fase estável de lactato sanguíneo até a exaustão: modelo contínuo vs. intermitente

Abstract

Objective: The aim of this study was to analyse the accumulated oxygen uptake (VO2), as well the main-tained time (TMcg) at high levels during a maximal lactate steady state (MLSS) exercise, determined incontinuous (MLSScon) and intermittent (MLSSint) modes, until exhaustion.Method: Fourteen trained cyclists performed an incremental maximal testing; 2-5 continuous and 2-4intermittent constant workload trials, in order to identify the MLSSconand MLSSint, respectively; twotests until exhaustion (TTE) (continuous and intermittent) were conducted using their respective MLSSworkloads.Results: The continuous TTE was significantly lower than TTE at intermittent protocol (54.7 ± 10.9 vs.67.8 ± 14.3 min; p = 0.001). The VO2at target workload (VO2cg) was higher at intermittent exercise(p < 0.05), at both situations (MLSS and TTE). On the other hand, TMcg and the VO2accumulated in MLSSworkloads (VO2ACcg) were higher during continuous mode (p < 0.0001), at both situations. The total VO2accumulated (VO2ACt) was similar between intermittent and continuous cycling (MLSS: 104.7 ± 8.7 L vs.103.9 ± 41.1 L and TTE: 193.8 ± 41.1 L vs. 226.4 ± 53.0 L, respectively).Conclusion: When MLSS continuous and intermittent were performed with same duration or untilexhaustion, the VO2ACt was similar, although the TMcg and VO2ACcg were smaller during intermittentexercise.