It can be hard to tell whether or not a teen's body weight is normal because at the age 13, for example, not only boys and girls grow at different paces, but among girls as well as among boys growth can be faster or slowlier and can stop at different age.
Teens can have differently developed muscles, and their body frame can be small or large - this also contribute to body weight differences within
healthy, normal body weight.
Let's take a look at a few cases of what's called Body Mass Index (BMI). BMI is a formula that doctors use to estimate how much body fat a person has based on his or her weight and height. At the age of 13, boys and girls having BMI under 15 are underweight, those with BMIs between 15 and 23 are considered having healthy weight, those with BMI above 23 but below 27 have the risk of developing obesity in the nearest future, and those with BMI above 27 are overweight. To figure out your BMI, use Kid's Health calculator. there, you'll also find good advice on how to understand your BMI and what start doing if it's outside the healthy limits.
We have special weight loss and diet tips for teens. Check them out!