Inclusion Criteria:  age 8 - 12 years clinical diagnosis of ASD from a physician or clinical psychologist based on the Diagnostic and Statistical Manual of Mental Disorders, 5th edition, (DSM-5) and confirmed with the Autism Diagnostic Interview- Revised (ADI-R) pre-puberty as indicated by Tanner stage I through screening by a physician being given an average of 8 hours of sleep per night by their parents over the past 3 months parents reported sleep onset delays of 30 minutes of longer on three or more nights per week free of psychotropic medications (allergy medications and medications for constipation are allowed) non-verbal IQ over 40 able to perform the requested physical intervention.  Exclusion Criteria:  with one or co-morbid psychiatric disorders identified with a structured interview based on DSM-5 with other medical conditions that limit their physical activity participation and sleep (e.g., asthma, seizure, cardiac disease etc) with a complex neurologic disorder (e.g., epilepsy, phenylketonuria, fragile X syndrome, tuberous sclerosis) participants who are currently meeting physical activity guidelines (more than or equal to 60 minutes of moderate and vigorous physical activity each day).