There was a significant negative correlation between the cognitive tests and time constant of the VO 2 kinetics. The time constant of VO 2 kinetics during the constant walking exercise was shorter and the maximal VO2 was higher in the ST children (16.88 ± 2.19 s 57.2 ± 6.0 ml/kg/min) compared to the UT children (20.99 ± 1.46 s 48.1 ± 7.4 ml/kg/min) (p<0,05). The ST children demonstrated better visual tracking and attention (95.97 ± 1.74%/94.4 ± 1.59%), response inhibition (96.49 ± 1.35%/93.72 ± 3.16%), speed of processing and alternating attention with a motor speed component (97.18 ± 3.0%/93.72 ± 2.16%) compared to the UT children (p<0.05). Pulmonary oxygen uptake (VO 2) was measured during constant treadmill walking (6 km/h, 4% grade, 6 min) and during an increasing walking exercise (modified Balke test). EF was evaluated using the ADAM4 battery. In all, 18 ST children and 12 UT children participated in this study. In addition, the relationship between EF and aerobic fitness was evaluated. The aim of the study was to compare the executive function (EF) between soccer trained (ST) and untrained (UT) 6-11 year old children.
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