![]() ![]() The BMI can't tell the difference between excess fat, muscle, or bone. Your BMI can tell you if you're carrying too much weight but it can't tell if you're carrying too much fat. If you're concerned about your child's weight, contact your GP who may be able to refer you to your local healthy lifestyle programme for children, young people and families. Measuring waist size is not routinely advised for children because it doesn't take their height into account. For example, a girl on the 75th centile is heavier than 75 out of 100 other girls her age. Find out more in very overweight childrenĪ child's BMI is expressed as a "centile" to show how their BMI compares to children who took part in national surveys. If you're concerned about your child's weight, see your GP. Get tips on how to encourage your child to be more active and eat well Healthy weight: between the 2nd and 91st centiles Underweight: on the 2nd centile or below. The BMI calculator works out if a child or young person is: ![]() Obese children are thought to be at increased risk of a variety of health conditions, and they're also more likely to be overweight or obese as adults. The cut-off points of the 2006 BMI-for-age reference for children aged 0–5 years for the diagnosis of overweight and obesity were set as the 97th and the 99th percentile, respectively.įor those aged 5–19 years, overweight is defined as a BMI-for-age value over +1 SD and obesity as a BMI-for-age value over +2 SD.įor children and young people aged two to 18, the BMI calculator takes into account age and gender as well as height and weight. In children, BMI is calculated as for adults and then compared with z-scores or percentiles.ĭuring childhood and adolescence the ratio between weight and height varies with sex and age, so the cut-off values that determine the nutritional status of those aged 0–19 years are gender- and age-specific. Some common conditions related to overweight and obesity include:īMI is also recommended for use in children and adolescents. The BMI ranges are based on the effect excessive body fat has on disease and death and are reasonably well related to adiposity.īMI was developed as a risk indicator of disease as BMI increases, so does the risk for some diseases. There is increased risk of co-morbidities for body mass index 25.0 to 29.9, and moderate to severe risk of co-morbidities for body mass index greater than 30. While the goal for individuals should be to maintain BMI in the range 20 to 25. To achieve optimum health, the range of 21 to 25 kg/m2. ![]() Mortality rates increase with increasing degrees of overweight, as measured by body mass index. Raised body mass index also increases the risk of cancer of the breast, colon, prostate, endometrium, kidney and gall bladder. Risks of coronary heart disease, ischemic stroke and type 2 diabetes mellitus increase steadily with increasing body mass index (BMI), a measure of weight relative to height. Overweight and obesity lead to adverse metabolic effects on joints, muscles, blood pressure, cholesterol, triglycerides and insulin resistance. It is defined as a person’s weight in kilograms divided by the square of the person’s height in metres (kg/m2).įor example, an adult who weighs 70 kg and whose height is 1.75 m will have a BMI of 22.9.įor adults over 20 years old, BMI falls into one of the following categories. BMI, formerly called the Quetelet index, is a measure for indicating nutritional status in adults.
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