This umbrella review addresses the relation between physical activity (PA) for children and youth with Attention Deficit Hyperactivity Disorder (ADHD) and positive outcomes. A systematic literature search in Medline, PsychInfo, and ERIC revealed 338 records, and 20 review articles were included in the analysis. The review articles referred to 130 different and mainly small empirical studies. Overall, the reviews suggest that PA can function as an effective intervention for children and youth with ADHD on: (1) cognition, (2) social-emotion and behavioural regulation, (3) fitness and motor control, and (4) neural function. However, results are mixed and the quality of the intervention (intensity, duration, frequency, length and type of exercise), participant and environmental characteristics, and relational aspects are discussed here as aspects that could affect the outcome.