Table 2. Differences in average results in pre, post and last examination of respiratory muscles parameters in the EG and CG. EG (n = 12) CG (n = 8) Mdn (IR) Z d Mdn (IR) Z d PImax % pre 124.13 (52.80) 2.401* 1.451### 147.46 (48.21) 0.281 0.141 PImax % post 167.47 (64.75) 1.332 0.802## 145.13 (43.22) 1.962* 0.982### PImax % last 157.80 (64.73) 2.583** 1.563### 171.22 (54.17) 2.103* 1.483### PEmax % pre 99.48 (28.07) 1.691 1.021### 100.78 (30.34) 0.561 0.281# PEmax % post 110.86 (46.96) 0.272 0.162 99.63 (37.40) 2.102* 1.052### PEmax % last 108.13 (42.94) 1.693 1.023### 121.96 (48.30) 1.823 1.293### PImax – maximal inspiratory mouth pressure; PEmax – maximal expiratory mouth pressure; % – percentage of predicted value; Mdn – median; IR – interquartile range; 1 difference between pre and post examination; 2 differences between post and last examination; 3 difference between pre and last examination; Z – Wilcoxon pair test; d – Cohen’s coefficient of effect size; * p < 0.05 # small effect ## moderate effect ### large effect.