急性有氧運動時間長度對ADHD孩童執行控制功能的影響

Single bout of aerobic exercise with moderate intensity has been linked to enhancement of cognitive performance in ADHD children. However, this positive effect may be moderated by the exercise duration. As such, the purpose of this study was to investigate the effect of exercise duration on executive function in ADHD children. A between subject design was employed that 49 ADHD children ranging from 8-12 years old were assigned to film-viewing (n = 15), 20 min (n = 19), and 40 min (n = 15) aerobic exercise groups. The Eriksen’s flanker task and neuroelectric assessment were administered before and after the completion of the intervention. A series of 2-way mixed design ANCOVAs 3(Condition: film viewing, 20 minute exercise, 40 minutes exercise) x 2 (stimulus: congruent, incongruent) were used to evaluate the effect of exercise duration on behavioral outcome (reaction time, reaction time variability, response accuracy), which the covariance was pre-test. As for the event-related potential measurements, a series of 3-way mixed design ANCOVAs 3(Condition: film viewing, 20 minute exercise, 40 minutes exercise) x 2 (stimulus: congruent, incongruent) x 3(electrode: Fz, Cz, Pz) were employed to evaluate the effect of exercise duration on the amplitude and latency of N200 and P300 separately. Due to poor data quality, only data from 33 children were analyzed and each group contained 11 children. The results showed that 20 min group had larger N2 amplitude compared to control group. This finding suggested that 20 min of single bout of aerobic exercise is beneficial to the inhibitory control in children with ADHD.