Less active if left out?

According to a small study published in Pediatrics (the official journal of the American Academy of Pediatrics), being left out, even for a little while, may contribute to a child's lack of physical activity.
 
The paper The Effect of Simulated Ostracism on Physical Activity Behavior in Children by Jacob E Barkley et al (click here to view). The researchers say this is the first study to look at the effect of ostracism on the physical activity of children.