Introduction: Attention-Deficit / Hyperactivity Disorder (ADHD) is a heterogeneous clinical condition in which some symptoms overlap. One of these problems is development coordination disorder (DCD). Comorbidity of ADHD-DCD disorder has adverse effects on motor, psychological and educational performance of these children. Indicates the prevalence of movement problems in children with ADHD (52%), that not all children with ADHD can have DCD. Therefore; there is a need for increased clinical accuracy in identifying ADHD children from children who are ADHD-DCD only. In our research, no study has examined the effect of motor interventions on these two comorbid disorders. The purpose of the study was to evaluate the effectiveness of targeted sensory-motor intervention on motor development of children with ADHD-DCD. Materials & Methods: The study method is quasi-experimental. 30 female students from 7 to 10 years old in Zabol city participated in this study by voluntary sampling method. To diagnose ADHD-DCD, the SNAP scale, clinical interview by a psychiatrist, Growth Coordination Disorder Questionnaire and Bruininks-Oseretsky motor test were used and the motor test score was used as a pre- and post-test score. Participants were randomly divided into control and experimental groups. The experimental group participated in 18 sessions of 60-minute in selected training program. The analysis was performed by analysis of covariance (P = 0.05). Results: gross motor skills of motor test showed significant changes (P <0.05), it only showed a significant effect on the speed and agility of the upper limbs (P = 0.01).
