[Influence of exercise in the body image of preadolescents and adolescents: importance of the index of corporal mass as a factor of confusion].

Introduction: adolescents are the group most vulnerable to distortions in the perception of their image. This often leads to body dissatisfaction that can negatively affect their self-esteem. The practice of physical activity (PA) could help solve this problem.

Associations between Self-Perceived and Desired Health-Related Physical Fitness in Spanish Children.

Health-related physical fitness (HRPF) has emerged as an important marker of health among children. It is usually defined as a multidimensional construct consisting of cardiorespiratory endurance; muscular strength and endurance; and flexibility. Currently, health policies are aimed at getting children to increase their HRPF levels.