A single BMI calculation doesn’t tell your kid’s whole weight story. As children grow, their body fat changes, so their BMI will change, too. That’s the reason it’s important to monitor BMI over time.
A last word of warning: BMI is the gold standard for screeningpossible weight problems — it can’t be used to create a final diagnosis. For example: If your child or adolescent is quite athletic and muscular, their BMI might be high due to extra muscle mass, not body fat (muscle weight more than fat).