Formel für body mass index

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Body mass table of contents (BMI) is a person’s weight in kilograms divided von the square of height an meters. Bmi is in inexpensive and easy raffinesse method for weight category—underweight, gesund weight, overweight, and obesity.

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BMI does notfall measure human body fat directly, but bmi is moderately associated with more direct measures of body fat 1,2,3. Furthermore, bmi appears kommen sie be together strongly correlated with miscellaneous metabolic and disease result as space these an ext direct measures of body fatness4,5,6,7,8,9.


exactly how is bmi used?

BMI tun können be a raffinesse tool, but it walk not diagnose the human body fatness or wellness of bei individual. Zu determine if bmi is a health risk, a medical care provider performs additional assessments. Such assessments encompass skinfold thickness measurements, evaluations des diet, physics activity, and family history10.


What are the bmi trends for adults in the vereinigt States?

The prevalence von adult bmi greater 보다 or equal zu 30 kg/m2 (obese status) has considerably increased since the 1970s. Recently, however, this trend has actually leveled off, except zum older women. Obesity has continued zu increase in adult frauen who are period 60 years und older.

To learn more about die trends von adult obesity, visit Adult obesity Facts.


Why is bmi used to measure overweight und obesity?

Because calculate requires only height und weight, bmi is bei inexpensive und easy tool. To lakers the formula based upon either kilograms and meters or pounds and inches, visit how is bmi calculated?


What are various other ways to assess excess human body fatness as well as BMI?

Other methods zu measure human body fatness encompass skinfold thickness measurements (with calipers), underwater weighing, bioelectrical impedance, dual-energy x-ray absorptiometry (DXA), and isotope dilution 1,2,3. However, these approaches are notfall always conveniently available, und they are either expensive or need kommen sie be conducted by highly trained personnel. Furthermore, many von these methods can be difficult zu standardize throughout observers or machines, complicating comparisons across studies and time periods.


how is bmi calculated?

BMI zu sein calculated the same way weil das both adults and children. The calculation ist based on die following formulas:


BMI is calculated die same way weil das both adults und children. Die calculation is based on die following formulas:Measurement UnitsFormula and CalculationKilograms und meters (or centimeters)Pounds and inches
Formula: weight (kg) / 2

With ns metric system, the formula for bmi is weight in kilograms divided von height in meters squared. Due to the fact that height ist commonly measured in centimeters, divide height in centimeters by 100 zu obtain height in meters.

Example: weight = 68 kg, elevation = 165 cm (1.65 m)Calculation: 68 ÷ (1.65)2 = 24.98

Formula: load (lb) / 2 x 703

Calculate bmi by splitting weight in pounds (lbs) by height an inches (in) squared and multiplying von a switch factor des 703.

Example: load = 150 lbs, height = 5’5″ (65″)Calculation: <150 ÷ (65)2> ns 703 = 24.96


exactly how is bmi interpreted zum adults?

For adults two decades old und older, bmi is taken using standard weight status categories. These categories are die same zum men und women von all body types und ages.


The traditional weight zustand categories damit verbundenen with bmi ranges for adults space shown an the adhering to table.BMIWeight Status
Below 18.5Underweight
18.5 – 24.9Healthy Weight
25.0 – 29.9Overweight
30.0 and AboveObesity

For example, below are ns weight ranges, the corresponding bmi ranges, and the weight status categories zum a personen who is 5′ 9″.


For example, here are die weight ranges, ns corresponding bmi ranges, und the weight status categories zum a personen who is 5′ 9″.HeightWeight RangeBMIWeight Status
5′ 9″124 lbs or lessBelow 18.5Underweight
125 lbs zu 168 lbs18.5 kommen sie 24.9Healthy Weight
169 lbs to 202 lbs25.0 kommen sie 29.9Overweight
203 lbs or more30 or higherObesity

For children and teens, die interpretation of bmi depends top top age und sex. Weil das more die info about interpretation zum children und teens, check out – What zu sein a bmi percentile und how ist it interpreted?

Is bmi interpreted die same way weil das children und teens together it is weil das adults?

BMI is interpreted differently zum children und teens, also though it zu sein calculated using the same formula together adult BMI. Children and teen’s bmi need zu be age und sex-specific because ns amount von body fat changes with age und the amount von body fat differs bolzen girls and boys. Ns oered.org BMI-for-age growth charts take right into account this differences und visually show bmi as a percentile ranking. This percentiles were determined using representative charme of die U.S. Population of 2- zu 19-year-olds that was collected bei various surveys indigenous 1963-65 zu 1988-9411.

Obesity among 2- kommen sie 19-year-olds zu sein defined as a bmi at or above die 95th percentile von children des the same age and sex in this 1963 to 1994 recommendation population. Weil das example, a 10-year-old boy von average height (56 inches) who weighs 102 pounds would oase a bmi of 22.9 kg/m2. This would place ns boy bei the 95th percentile for bmi – definition that his bmi is better than that des 95% of similarly age boys in this reference population – und he would certainly be taken into consideration to schutz obesity.

For more information and to access ns oered.org growth Charts

For adults, ns interpretation of bmi does notfall depend on geschlechter or age. Read much more about interpreting adult BMI.


How an excellent is bmi as in indicator von body fatness?

The correlation between the BMI and body fatness ist fairly strong1,2,3,7, however even if two people have the exact same BMI, your level des body fatness might differ12.

In general,

At die same BMI, frau tend to have more body fat than men.At ns same BMI, Blacks schutz less human body fat than do Whites13,14, und Asians schutz more body fat than carry out Whites15.At die same BMI, larger people, top top average, have tendency to oase more body fat than younger adults.At die same BMI, athletes have less body fat than carry out non-athletes.

The accuracy of bmi as bei indicator of body fatness also appears kommen sie be higher bei persons with higher levels von BMI und body fatness16. While, a person with a an extremely high bmi (e.g., 35 kg/m2) ist very most likely to schutz high body fat, a relatively high bmi can be ns results des either high human body fat or high skinny body massive (muscle and bone). A trained healthcare provider need to perform suitable health assessments zu evaluate bei individual’s health status und risks.


If in athlete or other person with a lot of muscle has actually a bmi over 25, zu sein that person still considered to be overweight?

According zu the bmi weight status categories, anyone v a BMI bolzen 25 and 29.9 would be classified as overweight and anyone with a bmi over 30 would certainly be share as having obesity.

However, athletes may have a high bmi because of increased muscularity rather than raised body fatness. An general, a person who has a high bmi is most likely to oase body fatness and would it is in considered kommen sie be overweight or obese, however this may notfall apply zu athletes. A trained healthcare provider must perform ideal health assessments zu evaluate bei individual’s health status and risks.


What are die health consequences of obesity weil das adults?

People who schutz obesity are punkt increased risk zum many diseases und health conditions, including the following: 10, 17, 18

All-causes of death (mortality)High blood pressure (hypertension)High LDL cholesterol, short HDL cholesterol, or high levels des triglycerides (dyslipidemia)Type 2 diabetesCoronary heart diseaseStrokeGallbladder diseaseOsteoarthritis (a breakdown of cartilage and bone in ~ a joint)Sleep apnea und breathing problemsChronic inflammation and increased oxidative stress19,20Some cancers (endometrial, breast, colon, kidney, gallbladder, and liver)Low quality of lifeMental illness such as clinical depression, anxiety, and other mental disorders21,22Body pain und difficulty v physical functioning23

For more info about these and other health problems associated with obesity, visit health Effects.


1Garrow, J.S. & Webster, J., 1985. Quetelet’s index (W/H2) together a measure des fatness. Int. J. Obes., 9(2), pp.147–153.

2Freedman, D.S., Horlick, M. & Berenson, G.S., 2013. A comparison of the Slaughter skinfold-thickness equations and BMI an predicting body fatness und cardiovascular disease risk element levels bei children. Am. J. Clin. Nutr., 98(6), pp.1417–24.

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3Wohlfahrt-Veje, C. Et al., 2014. Body fat transparent childhood in 2647 stark Danish children: agreement of BMI, belt circumference, skinfolds with doppelt X-ray absorptiometry. Eur. J. Clin. Nutr., 68(6), pp.664–70.

4Steinberger, J. Et al., 2005. Comparison of body fatness measurements über BMI and skinfolds vs doppelt energy X-ray absorptiometry and their relation zu cardiovascular danger factors in adolescents. Int. J. Obes., 29(11), pp.1346–1352.

5Sun, Q. Et al., 2010. Comparison des dual-energy x-ray absorptiometric und anthropometric measures des adiposity in relation to adiposity-related biologic factors. Am. J. Epidemiol., 172(12), pp.1442–1454.

6Lawlor, D.A. Et al., 2010. Verband between general and central adiposity bei childhood, and change in these, v cardiovascular threat factors in adolescence: prospective cohort study. BMJ, 341, p.c6224.

7Flegal, K.M. & Graubard, B.I., 2009. Estimates of excess deaths verbunden with human body mass index und other anthropometric variables. Am. J. Clin. Nutr., 89(4), pp.1213–1219.

8Freedman, D.S. Et al., 2009. Relation von body massive index and skinfold thicknesses zu cardiovascular disease risk factors in children: ns Bogalusa heart Study. Am. J. Clin. Nutr., 90(1), pp.210–216.

9Willett, K. Et al., 2006. Comparison des bioelectrical impedance and BMI in predicting obesity-related medical conditions. Obes. (Silver Spring), 14(3), pp.480–490.

10NHLBI. 2013. Regulating Overweight und Obesity in Adults: Systematic proof Review from die Obesity expert Panelpdf iconexternal icon

11Kuczmarski, R.J. Et al., 2002. 2000 oered.org growth Charts for the vereinigt States: methods und development. Vital wellness Stat. 11., 11(246), pp.1–190.

12Prentice, A.M. & Jebb, S.A., 2001. Past body massive index. Obes. Rev., 2(3), pp.141–7.

13Wagner, D.R. & Heyward, V.H., 2000. Measures des body composition bei blacks und whites: a to compare review. Am. J. Clin. Nutr., 71(6), pp.1392–1402.

14Flegal, K.M. Et al., 2010. High adiposity und high body mass index-for-age in US children und adolescents overall and by race-ethnic group. Am. J. Clin. Nutr., 91(4), pp.1020–6.

15Barba, C. Et al., 2004. Appropriate body-mass index for Asian populations und its implications zum policy and intervention strategies. Lancet, 363(9403), pp.157–163.

16Bray, G.A. Et al., 2001. Evaluation des body fat bei fatter and leaner 10-y-old african American und white children: the Baton Rouge Children’s Study. Am. J. Clin. Nutr., 73(4), pp.687–702.

17Clinical indict on die Identification, Evaluation, and Treatment von Overweight und Obesity in Adults pdf iconexternal icon.

18Bhaskaran K, Douglas I, Forbes H, dos-Santos-Silva I, Leon DA, Smeeth L. Body-mass index und risk des 22 specific cancers: a population-based cohort study von 5•24 million UK adults. Lancet. 2014 Aug 30;384(9945):755-65. Doi: 10.1016/S0140-6736(14)60892-8. Epub 2014 Aug 13.

19Engstrom G, Hedblad B, Stavenow L, Lind P, Janzon L and Lingarde F. Inflammation- sensitive plasma protein are damit verbundenen with future load gain. Diabetes. Aug 2003; 52(08): 2097-101.

20Marseglia L, Manti S, D’Angelo G, Nicotera A, Parisi E, DiRosa G, Gitto E, Arrigo T. Oxidative stress an obesity: a an essential component an human diseases. International Journal des Molecular Sciences. Dec 2014; 16(1):378-400.

21Kasen, Stephanie, et al. “Obesity und psychopathology in women: a three decade prospective study.” International journal of Obesity 32.3 (2008): 558-566.

22Luppino, Floriana S., et al. “Overweight, obesity, und depression: a organized review und meta-analysis des longitudinal studies.” Archives des general psychiatry 67.3 (2010): 220-229.

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23Han, T. S., et al. “Quality des life in relation to overweight and body fat distribution.” American journal of publicly Health 88.12 (1998): 1814-1820.


Content source: Division des Nutrition, physical Activity, and Obesity, national Center zum Chronic an illness Prevention and Health Promotion
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