Table 1. Search strategy used in PsycINFO.

1. Population	“school age*” or “young child*” or youth or adolesc* or teen* or preschool or early childhood or child* or infant or boy* or girl* or female* or male*
2. Physical activity	“physical* activ*” or exercis* or “motor activit*” or “locomotor activit*” or sport* or recreation*
3. Sedentary behavior	“sedentary behavio*” or sedentar* or “television view*” or "tv" or television or “video game*” or “screen time” or “electronic game*” or computer* or “small screen*” or e-game* or video* or "physical inactivity" or "screen based media" or gaming or “electronic media”
4. Autism spectrum disorder	Autis* or “Autism spectrum disorder” or ASD or Asperger’s* or “Pervasive Developmental Disorder” or “Autistic disorder” or “Pervasive Developmental Disorder Not Otherwise Specified” or PDD or PDDNOS
5. 2 or 3
6. 1 and 4 and 5
7. Limit 6 to peer-reviewed and English language and age groups: childhood (birth to 18 years)