Reliability and Validity of the Commitment to Physical Activity Scale for Adolescents.

Purpose: To examine psychometric properties of a Commitment to Physical Activity Scale for Adolescents (CPASA).

Design: Two test-retest studies and a prospective study, approved by a university institutional review board, were conducted in midwestern U.S.

Biological and Sociocultural Differences in Perceived Barriers to Physical Activity Among Fifth- to Seventh-Grade Urban Girls.

Background: Inadequate physical activity (PA) contributes to the high prevalence of overweight and obesity among U.S. adolescent girls.

Process evaluation for a school-based physical activity intervention for 6th- and 7th-grade boys: reach, dose, and fidelity.

The purpose was to evaluate the reach, dose, and fidelity of Guys Only Activity for Life (G.O.A.

"Girls on the Move" intervention protocol for increasing physical activity among low-active underserved urban girls: a group randomized trial.

Background: Increasing moderate to vigorous physical activity among urban girls of low socioeconomic status is both a challenge and a public health priority. Physical activity interventions targeting exclusively girls remain limited, and maintenance of moderate to vigorous physical activity during the post-intervention period has been difficult to maintain. The main aim of the 5-year "Girls on the Move" group randomized trial is to evaluate the efficacy of a comprehensive school-based intervention in increasing girls' minutes of moderate to vigorous physical activity and improving cardiovascular fitness, body mass index, and percent body fat immediately post-intervention (after 17 weeks) and at 9-month post-intervention follow-up (9 months after end of intervention).