The study aimed to evaluate whether a 12-week physical exercise intervention would improve psychological resilience and mental ill-being (e.g. internalising and externalising symptoms) in medical-naïve children with Attention-Deficit/Hyperactivity Disorder (ADHD). In a parallel two-group randomised controlled trial (RCT) design, 30 children between 8-12 years (M(age) = 8.62 ± 1.37) formally diagnosed with ADHD were assigned to a 12-week physical exercise intervention group (three sessions per…