That reference for ACE refers to an unreferenced chart from another web site. TheScotch ( talk) 11:32, 22 February 2013 (UTC) Reply New York Body Building Journal? The size of breasts varies dramatically, however, which should throw an adjustable spanner into the works. It is both reasons, less muscle mass and also more body fat for reproductive purposes.īreasts are almost entirely fat, and probably add a substantial percentage of difference in body fat, especially at the leanest levels. It's just mathematically obvious even if it hurts your feelings. Reponse: uhm it's the general consensus that if two people have the same frame and one has a much larger bf% then the other one has more muscle mass. At any rate, I think we should seek a more useful explanation than simply "less muscle mass." Rklawton 17:43, 10 February 2006 (UTC) Reply Perhaps the higher percentage is related to helping a woman survive the demands of pregnancy. The fact that women do have a higher body fat percentage begs better explanation. Women could simply weigh less and have a body fat percentage equal to men's. While it is true that on average women have a higher percentage of body fat, it doesn't follow that less muscle mass means a higher percentage of body fat. Preceding unsigned comment added by Dee26 ( talk Unforutnately, until more figures based on scientific studies are available, it's hard to back information up.
If men and women have a specific percentage of essential fat which is fixed, plus the fact that women have a higher percentage of storage fat than men, then the female figures are 1) too low compared to the men's and 2)there should be a wider range. In fact I think the whole stated range makes no sense. This has to be an error or typo and it should either be corrected or removed. Recommend bf % for women according to first uncited source: article says acceptable range is 20-21% i.e. TheScotch ( talk) 17:32, 13 February 2013 (UTC) Reply The normal effect for older (unaffected by chemicals and additives because already fully grown) muscular individuals will still necessarily be to overestimate obesity.
If the population on average has gotten less muscular (as may be a corollary of the very rapid spurt in average height of the past few decades, probably as a result of artificial chemicals in the environment or chemicals added to commercially-packaged food, affecting still-developing individuals), and the scale hasn't been accordingly adjusted, then BMI may tend to underestimate obesity, but only on average. Whether BMI tends to underestimate or overestimate fat depends on the fixed amount it assumes (its scale) and the individual. In any case, the obvious essential problem with BMI is that it assumes the amount of non-fat tissue per height is fixed for all individuals at all times, and of course it isn't. The second one says only that BMI is better at determining how obese someone is than whether they're obese. The first one says only that BAI is not an accurate measurement. Preceding unsigned comment added by 69.164.93.100 ( talk) 20:26, 4 June 2012 (UTC) Reply You've misread at least the first two of your links-I've only looked at two so far-, and zero-for-two is not a good batting average. dual-energy X-ray absorptiometry in the Newfoundland population. The role of fat mass index in determining obesity.īody mass index misclassification of obesity among community police officersĬomparison of the classification of obesity by BMI vs. Measuring Adiposity in Patients: The Utility of Body Mass Index (BMI), Percent Body Fat, and Leptin Here are a bunch of studies which substantiate this:Īccuracy of Body Mass Index to Diagnose Obesity In the US Adult Populationĭiagnostic performance of body mass index to identify obesity as defined by body adiposity: a systematic review and meta-analysis. the proportion individuals with normal weight BMIs but obese bodyfat percentages. However, it seems that the opposite is true - most of the inaccuracy of BMI comes from the number of false *negatives* for obesity, i.e. This implies that BMI is inaccurate due to the number of false positives for obesity. The thresholds between "normal" and "overweight" and between "overweight" and "obese" are sometimes disputed for this reason.
Due to differences in body composition, the BMI is not necessarily an accurate indicator of body fat for example, individuals with greater muscle mass will have higher BMIs. The widely used body mass index (BMI) provides a measure that allows for the comparison of individuals of different heights in terms of their weight. The language in the beginning of the article regarding the accuracy of BMI seems misleading.