The goal of this study was to evaluate potential mental health benefits of yoga for adolescents in secondary school. Students were randomly assigned to either regular physical education classes or to 11 weeks of yoga sessions based upon the Yoga Ed program over a single semester. Students completed baseline and end-program self-report measures of mood,… (More)
Background Medical devices are used widely for virtually every disease and condition. Although devices are subject to regulation, the number of recalls, the clinical data requirements for regulation and the impact on patient safety are poorly understood. Methods The authors defined a device using European directives and used publicly available information… (More)
BACKGROUND To assess the extent and nature of claims regarding improved sports performance made by advertisers for a broad range of sports-related products, and the quality of the evidence on which these claims are based. METHODS The authors analysed magazine adverts and associated websites of a broad range of sports products. The authors searched for… (More)
OBJECTIVE To determine how Hispanic residential concentration moderates the relationship between neighborhood collective efficacy and teenage birth rates. DESIGN Cross-sectional analysis of census tract level survey data and birth records. SETTING Sixty-five Los Angeles (California) County census tracts in 2000 and 2001. PARTICIPANTS Measures of… (More)
Many policy measures to control the obesity epidemic assume that people consciously and rationally choose what and how much they eat and therefore focus on providing information and more access to healthier foods. In contrast, many regulations that do not assume people make rational choices have been successfully applied to control alcohol, a substance -… (More)
This paper consists of an inquiry into the factors that help and hinder experienced instructors in transitioning to teaching online. These factors include intrinsic personality characteristics, job support and training to acquire online teaching skills.