Abstract

GROSSL, T.; BARBOSA, L.F.; LUCAS, R.D. de  and  GUGLIELMO, L.G.A.. Oxygen uptake during cycling at maximal lactate steady state to exhaustion: continuous vs. intermittent model. Rev Andal Med Deporte [online]. 2014, vol.7, n.4, pp.155-161. ISSN 2172-5063.  https://dx.doi.org/10.1016/j.ramd.2014.02.001.

Objective: The aim of this study was to analyse the accumulated oxygen uptake (VO₂), as well the maintained time (TMcg) at high levels during a maximal lactate steady state (MLSS) exercise, determined in continuous (MLSS_con) and intermittent (MLSS_int) modes, until exhaustion. Method: Fourteen trained cyclists performed an incremental maximal testing; 2-5 continuous and 2-4 intermittent constant workload trials, in order to identify the MLSS_con and MLSS_int, respectively; two tests until exhaustion (TTE) (continuous and intermittent) were conducted using their respective MLSS workloads. 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 VO₂ at target workload (VO₂cg) was higher at intermittent exercise (p < 0.05), at both situations (MLSS and TTE). On the other hand, TMcg and the VO₂ accumulated in MLSS workloads (VO₂ACcg) were higher during continuous mode (p < 0.0001), at both situations. The total VO₂ accumulated (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 until exhaustion, the VO₂ACt was similar, although the TMcg and VO₂ACcg were smaller during intermittent exercise.

Keywords : Physiological response; Aerobic capacity; Submaximal performance; Cycling.

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