Randomized Controlled Trial of Healthy Harlem's Get Fit Program: An After-School Intervention for Childhood Overweight and Obesity in the Harlem Children's Zone.

Although the increases in overweight and obesity observed for several decades have appeared to have leveled off, the prevalence of overweight and obesity remains exceptionally high among children of color. This article estimates the effect of Healthy Harlem's Get Fit-a 12-week after-school program aimed at helping students improve physical activity and eating habits-on BMI and weight status of adolescents. Participants were 436 students who had overweight or obesity in 12 Harlem Children's Zone after-school programs in New York.

The Impact of Playworks on Students' Physical Activity by Race/Ethnicity: Findings from a Randomized Controlled Trial.

Background: The Playworks program places coaches in low-income urban schools to engage students in physical activity during recess. The purpose of this study was to estimate the impact of Playworks on students' physical activity separately for Hispanic, non-Hispanic black, and non-Hispanic white students.

Methods: Twenty-seven schools from 6 cities were randomly assigned to treatment and control groups.

The impact of playworks on boys' and girls' physical activity during recess.

Background: School-based programs, such as Playworks, that guide students in organized activities during recess and make improvements to the recess play yard may lead to significant increases in physical activity-especially for girls. This study builds on past research by investigating the impact of Playworks separately for girls and boys.

Methods: Twenty-nine schools were randomly assigned to receive Playworks for 1 school year or serve as a control group.

The impact of Playworks on students' physical activity during recess: findings from a randomized controlled trial.

Objective: To evaluate the impact of Playworks on students' physical activity during recess.

Method: Twenty-seven elementary schools from six U.S.

Estimated Distributions of Usual Physical Activity during Recess.

Purpose: This study aimed to estimate distributions of usual physical activity during recess in schools in low-income areas using measurement error models and to compare model-adjusted distributions to unadjusted distributions based on a single day of measurement.

Methods: A randomized study of the Playworks program was conducted in 29 schools from six U.S.

Girls' and boys' developing interests in math and science: do parents matter?

Previous studies (for example, Bregman & Killen, 1999; Eccles, Wigfield, & Schiefele, 1998; Jacobs, 1991;Jacobs & Eccles, 2000) have demonstrated the important role that parents' attitudes play in shaping their children's later self-perceptions and achievement behaviors. Studies indicate that in the math and science arena, parents' perceptions of their children's abilities as well as their own values about math and science are related to their children's later self-perceptions and values for achieving in these domains. The previous work suggests that parents are conveying their attitudes and values about math to their children through their words and actions; however, little research has documented the ways in which parents' beliefs and specific behaviors might promote positive achievement attitudes and behaviors in their children.