Body mass index is one of many body composition tests doctors use to assess your risk of cardiovascular disease. While there are some criticisms to the BMI for not taking into account ethnicity and physical fitness level, the scale is an accurate predictor of several conditions related to obesity. A BMI of 26 is considered overweight, but not quite a significant cause for concern.
BMI Classifications
Any BMI value less than 18.5 is considered underweight, while a BMI between 18.5 and 24.9 is said to be healthy. BMI values of 25 to 30 are considered overweight, while a measure greater than 30 is classified as obese. A BMI greater than 40 is considered extreme obesity. A BMI of 26 would be considered just slightly overweight.
BMI Calculation
You can calculate your BMI using an online calculator, although the formula is fairly simple. Calculate your BMI by dividing your weight in pounds by your height in inches squared, then multiply this outcome by the number 703. Someone who is 180 lbs. and measures 70 inches tall would have a BMI of about 26.
BMI Uses
BMI can provide an indication of your body fat and can also help predict several diseases. Each BMI classification beyond normal is associated with an increased risk of cardiovascular issues. A BMI of 26 corresponds to being a little more than 10 percent overweight and places you at a greater risk of heart and blood vessel disease. A BMI beyond 30 increases your chances of developing full cardiovascular disease. A BMI greater than 40 may be fatal.
Other Tests
You can combine your BMI with a measure of your waist circumference to get an even better idea of your risk for developing diabetes, high blood pressure and cardiovascular disease. A man with a BMI of 26 would want to have a waist circumference of less than 40 inches to have the lowest risk of disease, while a woman with a BMI of 26 would need a waist circumference of less than 35 inches. A combination of a high BMI and large waist circumference places you at the highest risk of disease.
References
- American Heart Association: Body Composition Tests
- National Heart Lung and Blood Institute: Losing Weight, Body Mass Index
- "Essentials of Strength Training and Conditioning"; Thomas R. Baechle and Roger W. Earle; 2008



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