Maximal Lactate Steady-State Independent Of Recovery Period During Intermittent Protocol

The following lines show the abstract of the article entitled “Maximal Lactate Steady-State Independent Of Recovery Period During Intermittent Protocol”, which was written in English by Luis F. Barbosa, Mariana R. De Souza, Renato A. C. Caritá, Fabrizio Caputo, Benedito S. Denadai and Camila C. Greco. This article was published in Journal of Strength and Conditioning Research 25(12):3385–3390, 2011

“The purpose of this study was to analyze the effect of the measurement time for blood lactate concentration ([La]) determination on [La] (maximal lactate steady state [MLSS]) and workload (MLSS) during intermittent protocols [MLSSwi]) at maximal lactate steady state determined using intermittent protocols.

Nineteen trained male cyclists were divided into 2 groups, for the determination of MLSSwi using passive (VO2max = 58.1 ± 3.5 ml kg-1 min-1; N = 9) or active recovery (VO2max = 60.3 ± 9.0 ml kg-1 min-1; N = 10). They performed the following tests, in different days, on a cycle ergometer:

(a) Incremental test until exhaustion to determine VO2max and

(b) 30-minute intermittent constant-workload tests (7 x 4 and 1 x 2 minutes, with 2-minute recovery) to determine MLSSwi and MLSS.

Each group performed the intermittent tests with passive or active recovery. The MLSSwi was defined as the highest workload at which [La] increased by no more than 1 mmol L-1 between minutes 10 and 30 (T1) or minutes 14 and 44 (T2) of the protocol. The MLSS (Passive—T1: 5.89 ± 1.41 vs. T2: 5.61 ± 1.78 mmol L-1) and MLSSwi (Passive—T1: 294.5 ± 31.8 vs. T2: 294.7 ± 32.2 W; Active—T1: 304.6 ± 23.0 vs. T2: 300.5 ± 23.9 W) were similar for both criteria. However, MLSS was lower in T2 (4.91 ± 1.91 mmol L-1) when compared with T1 (5.62 ± 1.83 mmol L-1) using active recovery.

We can conclude that the MLSSwi (passive and active conditions) was unchanged whether recovery periods were considered (T1) or not (T2) for the interpretation of [La] kinetics. In contrast, MLSS was lowered when considering the active recovery periods (T2). Thus, shorter intermittent protocols (i.e., T1) to determine MLSSwi may optimize time of the aerobic capacity evaluation of well-trained cyclists.”


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