Due to changes in weight and height with age, as well as their relation to body fatness, BMI levels among children and teens are expressed relative to other children of the same sex and age. Is BMI interpreted the same way for children and teens as it is for adults?īMI is interpreted differently for children and teens even though it is calculated with the same formula. With individuals, health care providers should consider BMI along with other factors such as family history, blood pressure, blood sugar levels, and eating patterns and physical activity level. A single BMI-for-age calculation is not enough to evaluate long-term weight status because your child’s height and weight will change as they grow. Tracking growth patterns over time can help you make sure your child is achieving or maintaining a healthy weight. If your child has significant weight loss or gain, he or she should be referred to and guided by a doctor or other healthcare provider. Regardless of the current BMI-for-age category, help your child or teen develop healthy weight habits and talk with your doctor or other healthcare provider as part of ongoing tracking of BMI-for-age.
For children and teens, BMI is age- and sex-specific and is often referred to as BMI-for-age. It is an inexpensive and easy way to screen for weight categories that may lead to health problems. People can also calculate their RMR using an online calculator, such as the one provided by ACE, here.Body mass index (BMI) is a person’s weight in kilograms divided by the square of height in meters. Examples include the Cunningham equation, which estimates RMR, and the Katch-McArdle equation, which estimates BMR. Other optionsĪ more athletic person may get a more accurate estimate using an equation that takes into account their lean body mass.
As a result, it is unlikely that a person could accurately calculate their BMR at home.Īs a simpler alternative, people can try calculating their RMR. Experts refer to this analysis as “calorimetry.” It is a way of measuring the number of calories a person’s body is using.Īccording to the American Council on Exercise (ACE), people rarely use BMR outside of clinical settings because the test must take place in a tightly controlled environment under stringent testing parameters. Because the testing conditions of measuring the RMR are less stringent than those required to measure the BMR, the RMR may be slightly less accurate than the BMR.īMR calculations involve analyzing the amount of oxygen and carbon dioxide a person breathes in and out. People do not need to fast or rest for an extended period in a controlled environment to get an estimate. The RMR estimates the number of calories a person burns during a period of inactivity.
However, to get an accurate estimate, a person must undergo monitoring in a clinical setting under tightly controlled conditions. The BMR estimates the minimum number of calories a person needs each day to sustain their basic life functions should they rest for the entire 24 hours of a day.
However, the two tests differ slightly in what they estimate and what the test involves. People often use the terms BMR and RMR interchangeably.
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