Exercise and Cognition in Children With ASD

Inclusion Criteria: * age 8 - 12 years * mild to moderate ASD (i.e., level 1-2 support classification) diagnosis from physicians or psychologists based on the Diagnostic and Statistical Manual of Mental Disorders, 5th edition, (DSM-5) and Autism Diagnostic Observation Schedule, 2nd Edition (ADOS-2) * non-verbal IQ over 50 using a brief version of the Wechsler Intelligence Scale for Children (Chinese revised) \[C-WISC\] * able to follow instructions with the assistance of research staff * able to perform the requested physical intervention, executive function measures and mediator measures with the assistance of the research staff * no additional regular participation in physical exercise other than school physical education classes for at least one month prior to the study * novice at riding a two-wheel bicycle (i.e., cannot ride the bicycle alone for more than 10 consecutive seconds). Exclusion Criteria: * other medical conditions that limited physical exercise capacities (e.g., asthma, seizure, cardiac disease) * a complex neurologic disorder (e.g., epilepsy, phenylketonuria, fragile X syndrome, tuberous sclerosis) * suffering from obesity (i.e., \> 95 percentile of age-gender specific BMI cutoff, such that it would be difficult for research staff to catch them if they began to fall when riding * self-reported color blindness.