Racette SB, et al. – This study was designed to quantify sex differences in FITNESSGRAM health risk–based on aerobic capacity and body composition among urban public elementary school children. Collected data showed that a higher proportion of girls failed to meet the Healthy Fitness Zone (HFZ) for aerobic capacity, percent body fat, and the combination of aerobic capacity and percent body fat than boys. These findings highlighted the importance of addressing modifiable, lifestyle–related health risks among urban minority children, particularly in girls.