Then the doctor uses these numbers to calculate another number, the BMI. Once the doctor measures the BMI of a child or adolescent, this number on a specific chart to compare it with other people the same age and sex. In general, it is considered that a person whose BMI is above the 95th percentile (ie, the BMI is over 95 of the people of the same age. The good news is it’s never too late to change the eating habits and exercise to control weight, and those changes need not be as big as you might think. Therefore, if you or someone you know is obese or overweight, this article provides information and advice to address the problem by adopting a healthy lifestyle.