ABC | Volume 110, Nº4, April 2018

Original Article Winter et al High-intensity training after AMI Arq Bras Cardiol. 2018; 110(4):373-380 Table 3 – Within-group comparisons of pre- and post-training lactate test parameters Variables Group N Mean T1 (SD) Mean T2 (SD) p LR CG 10 3.90 ± 1.07 4.32 ± 0.47 0.240 CTG 9 3.83 ± 0.96 3.96 ± 0.22 0.720 ITG 10 4.18 ± 0.81 4.24 ± 0.32 0.830 LO CG 10 5.92 ± 1.11 5.99 ± 0.74 0.850 CTG 9 5.90 ± 2.26 5.07 ± 0.88 0.392 ITG 10 5.96 ± 1.04 5.18 ± 0.47 0.084 L12g CG 10 6.58 ± 1.16 6.76 ± 1.04 0.735 CTG 9 7.32 ± 1.83 5.66 ± 1.06 0.062 ITG 10 8.08 ± 1.56 5.82 ± 0.65 0.002* L13.5g CG 10 6.80 ± 1.32 6.52 ± 1.80 0.733 CTG 9 8.11 ± 2.14 5.67 ± 0.92 0.014* ITG 10 8.40 ± 2.28 5.97 ± 0.80 0.032* CG: control group, CTG: continuous training group; ITG: interval training group; SD: standard deviation; LR: lactate at rest; LO: lactate without overload; L12g: lactate with 12 grams of additional load; L13.5g: lactate with 13.5 grams of additional load. Student’s t test. * p < 0.05. The only significant change detected in the echocardiographic analysis after the study was the increase in EDD (p = 0.008) in the CG, which suggests that, after a six-week period of rest, these animals had an unfavorable ventricular remodeling when compared to the other groups. In an experimental study by Gaudron et al., 14 156 rats were randomized after coronary occlusion into three groups – sedentary, those who started training 4 days after AMI and those who started training 21 days after AMI. The aim of the study was to assess the influence of continuous training (8 weeks’ Table 4 – Between-group comparison of lactate test parameters Variable Group n Mean ± SD p-value LWO 1 CG 10 5.92 ± 1.11 0.996 CTG 9 5.90 ± 2.26 ITG 10 5.96 ± 1.04 LWO 2 CG 10 5.99 ± 0.74 0.016* CTG 9 5.07 ± 0.88 ITG 10 5.18 ± 0.47 L 12 g 1 CG 10 6.58 ± 1.16 0.110 CTG 9 7.32 ± 1.83 ITG 10 8.08 ± 1.56 L 12g 2 CG 10 6.76 ± 1.04 0.031* CTG 9 5.66 ± 1.06 ITG 10 5.82 ± 0.65 L 13.5g 1 CG 10 6.80 ± 1.32 0.176 CTG 9 8.11 ± 2.14 ITG 10 8.40 ± 2.28 L 13.5 g 2 CG 10 6.52 ± 1.80 0.341 CTG 9 5.67 ± 0.92 ITG 10 5.97 ± 0.80 CG: control group; CTG: continuous training group; ITG:interval training group; SD: standard deviation; LR: lactate at rest; LWO: lactate without overload; L12g: lactate with 12 grams of additional load; L13.5g: lactate with 13.5 grams of additional load. 1: first evaluation; 2: final evaluation. One-factor ANOVA * p < 0.05. 376