Background: Physical education (PE) can improve physical fitness; however, little research has evaluated PE's long-term influence. The purpose is to determine PE's longitudinal effects on fitness in a group of adolescent girls and to determine whether body mass index (BMI) status influenced any potential effects. Methods: Participants were…

Background: This study examines the differences among black, Hispanic, and white adolescent girls in their perceptions surrounding physical activity (PA), including support within the school climate, friend and family social support, and personal enjoyment. Methods: Participants included 1466 sixth-grade girls from 36 middle schools across the…

The body mass index (BMI), or the ratio of weight in kilograms to the square of height in meters, is widely used to determine the presence or absence of overweight and obesity in adults. Although many consider BMI an acceptable clinical surrogate of body fatness, it does not differentiate between fat and fat-free tissues. Thus, children and…

National health statistics highlight a serious problem in adolescent girls and boys. Too many teenagers are sedentary, unfit, overweight, and prone to related health consequences (Fagot-Campagna, Pettit, Engelgau, Burrows, & Geiss, 2000; Flegal, 1999; Ogden, Flegal, Carroll, & Johnson, 2002; Troiano & Flegal, 1998). Ethnic teens have been less…

The "Morbidity and Mortality Weekly Report" ("MMWR") Series is prepared by the Centers for Disease Control and Prevention (CDC). Data in the weekly "MMWR" are provisional, based on weekly reports to CDC by state health departments. This issue of "MMWR" contains the following studies: (1) Youth Risk Behavior…