Obesity is a serious health concern affecting Americans across the nation.young people. Studies show that more children, teens, and young adults wrestle with obesity now more than any other time in our history. It's linked to type 2 diabetes, fractures, joint pain, menstrual irregularities and depression as well as worsening chronic conditions such as asthma.
Body mass index (BMI) estimates a person's body fat by calculating a their weight and height. Body fat changes with age, and girls and boys differ in their body fat as they mature. This is why BMI for children, also known as BMI-for-age, includes gender and age.