Many athletes actively seek changes in body weight in hopes of improving athletic performance. In some sports, such as wrestling, gymnastics, dancing, and running, some athletes and coaches may associate optimal performance with a relatively low body mass. In other sports, particularly contact and collision sports, such as football, increased body mass is often encouraged. Athletes interested in losing or gaining weight should discuss strategies for healthy weight loss or weight gain with their doctor.

Here is information from the American Academy of Pediatrics about healthy weight loss or weight gain for young athletes.

Concerns about weight in this age group should be addressed with the child’s doctor. These discussions should focus on growing healthy bodies rather than achieving a specific weight and include education for families on fostering healthy lifestyle habits. Children in this age range with a body mass index (BMI) that is greater than the 99th percentile...

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