The goal of this clinical trial is to investigate the neurophysiological foundation of the impact of the acute effects of controlled aerobic exercise intensity in adolescents with ADHD, its involvement in cognitive processes, and clinical outcomes in respect to executive functions. The main questions it aims to answer are: * To find out the effects of a single bout of aerobic exercise intervention on neurophysiology and executive functions in adolescents with ADHD * To examine the relationship between neurophysiology and executive functions following a single bout of aerobic exercise intervention Participants will be asked to do three different executive function tasks regarding inhibitory control, working memory and cognitive planning and receive the evaluation of motor cortex excitability via transcranial magnetic stimulation (TMS) before and after a single bout of 30-min aerobic cycling exercise of moderate intensity. Researchers will compare the control group with 30-min video-watching to see if effects of a single bout of aerobic exercise intervention on neurophysiology and executive functions in adolescents with ADHD.