Increased Activity in Unstructured Versus Structured Gym Time in an After-School Program.

Background: More than 10 million American youth engage in after-school programs that provide an opportunity to increase physical activity. The purpose of this study was to test the hypothesis that children in unstructured gym time (free) would have greater activity than both structured gym time (structured) and when increased screen time was available.

Methods: Three interventions were compared in a nested design, with each two-week intervention preceded and followed by a two-week control period.

The effect of social networking sites on the relationship between perceived social support and depression.

This study examined whether Social Networking Sites (SNSs) have a negative moderator effect on the established relationship between perceived social support and depression in psychiatric inpatients. Survey instruments assessing for depression, perceived social support, and SNS use, were filled out by 301 psychiatric inpatients. Additional data on age, gender, and primary psychiatric diagnosis were collected.