FIGURE 2.

Blood lactate levels (mean values ± SD) of the 20 participants performing a voluntary 30-min exercise at 60 and 80% VO_2max. Measurements were carried out every 10 min before the exercise (pre), during the 30-min exercise, and 10 min after the conclusion (post). The dotted line indicates the level (4 mmol/l) of the Onset of Blood Lactate Accumulation (OBLA). Results of Tukey’s Multiple Comparison Test carried out on data are also presented. ANOVA with Tukey’s multiple comparison test are the following: ^∗p < 0.05, ^∗∗p < 0.01, ^∗∗∗p < 0.001.