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Because key factors are omitted from this approach, your client may be healthy, strong, and athletic but miscategorized. The BMI divides all people into four categories and numbers. The logic behind BMI is inherently flawed. It requires squaring your client’s height and even excludes waist size, which doesn't make any scientific sense for measuring body fat. However, scientifically, these results don’t add up. The BMI formula doesn’t make much sense.īody mass index computes body fat based on height and weight. For example, some people may have high blood pressure or high cholesterol, which could contribute to a person's health by having risks of cardiovascular problems despite appearing healthy based on their BMI measurement alone. For example, a woman who trains frequently and has very little body fat might have a high number because she has more muscle tissue than another woman of the same height and weight.įurthermore, the calculations for BMI don't consider any other factors that can impact your health. The other issue with BMI is that it can be misleading to naturally muscular people. The metric also doesn't factor in height or weight fluctuation over time.Ī person who has been training consistently for years and added lean muscle mass may have a higher BMI even though they're in better shape than someone with the "ideal" weight. Many people use BMI to measure someone's health or fitness levels quickly, but it is not accurate.īMI does not account for many different factors that affect one's health and fitness, such as muscle mass and body fat percentage. Nor does it account for the distribution of fat on someone's body, which can be a more accurate measure of their health risks than BMI alone. For example, if you weigh 150 pounds and are 5 feet 8 inches tall, your BMI is 24.8 (150/4*4 = 24.8).īMI does not account for influential factors, like muscle mass or bone density. BMI is calculated by dividing an individual’s weight in kilograms by the square of the individual’s height in meters (kg/m2). What Is BMI?īMI is a measure of body fat based on height and weight. This article will explore some of the truths and myths about BMI and why it does not work as an accurate measure of someone's fitness level or health risks. Many people take the BMI number at face value without understanding its meaning. Because they are not catered to individual needs, this methodology will produce an inefficient assessment for your clients. Instead, these methods look at broad, general trends across large groups of people that reveal an average result. These one-size-fits-all approaches result in a single number that will not accurately evaluate your client’s overall health status.
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Due to this outdated method, recent studies show that many people often end up mislabeled as “unhealthy.” Similarly, body fat calculators use formulas that leave room for many errors and false reports. However, the methodology for evaluating body fat is mainly flawed, especially as it relates to the Body Mass Index (BMI).īody Mass Index (BMI) is the outdated yet still popular approach of determining body fat based on weight and height. Instantly you will be able to see the differences between the traditional and revised BMI calculations, and discover whether or not your weight falls within the acceptable guidelines for your height.With obesity affecting over 35% of adults in the United States, the topic of body fat measurement has never been more apparent. To discover your BMI on our handy interactive calculator using both the old and new formulas, simply choose between imperial or metric measurements, then enter your height and weight, and press ‘Go’. Likewise, a woman measuring 155cm and weighing 59kg would find herself within acceptable range under the old system with a BMI of 24.6, however the new system would class her as overweight at 25.6.For example, a man measuring 190cm tall and weighing 95kgs would have a BMI of 26.3 using the old system, which would class him as overweight, whereas the new system would class him as within acceptable range at 24.8.In that way, short people are misled into thinking they are thinner than they actually are, and tall people conversely believe they are fatter. The main problem with the current method for measuring BMI is that it divides the weight by too large a number for shorter people, and by too small a number for taller people. Traditionally BMI is measured by a person’s weight in kilograms divided by the square of their height in meters – the acceptable range for BMI is between 18.5 and 25. New BMI: 1.3 x weight(kg)/height(m) 2.5.