The sample
did not include children with Down Syndrome. The following criteria were observed when creating the sample of children
with ID: presence of intellectual disability as defined by the American Psychiatric Association (2000); children in the 6.5–12
age range; normal neurological and health status. The study excluded children with metabolic diseases, as well as musculoskeletal,cardio and respiratory system diseases, in order to avoid potential influence of neurological and health factors on physical fitness test results