08/02/2006: Thomson Medstat, a health care research house, is reporting a study that shows 75% of obese people claim to have healthy eating habits, and 40% claim to do rigorous exercise at least three times per week.
I will be the first to admit that obesity is a serious problem in America, as it is contributing to a myriad of health problems–diabetes, high blood pressure, heart disease–that affect both the young and the old. I’ll also concede that there is a tendency among the obese to blame other factors besides behavioral matters for their condition. (I’ve been there.)
However, I must take issue with the study in one respect: the firm used Body Mass Index (BMI) as the criterion for obesity. The BMI is a piss-poor metric, as many athletes–with less than 10% body fat–can have a BMI that indicates obesity. That is because body mass includes muscle, which is more abundant in athletes–or physically active people in general–than in sedentary people.
By using BMI to define obesity, researchers could be overstating the prevalence of obesity. (Perhaps this is by design, as such inflation of statistics will lead to more federal funding for anti-obesity programs.) In fact, The BMI was never designed as a tool for the medical diagnosis of obesity.
That said, a better metric for determining obesity is body fat percentage.
I suggest using the standards developed by the American Council on Exercise:
| Description |
Women |
Men |
| Essential fat |
10-13% |
2-5% |
| Athletes |
14-20% |
6-13% |
| Fitness |
21-24% |
14-17% |
| Acceptable |
25-31% |
18-24% |
| Obesity |
32%+ |
25%+ |
Personally, I think those metrics are too loose, but they’re a better measure of obesity than BMI. If it were up to me, I’d recommend the following:
| Description |
Women |
Men |
| Underweight/Anorexic |
< = 7% |
< =5% |
| Athletes |
8-15% |
6-15% |
| Normal |
16-24% |
16-20% |
| Overweight |
25-30% |
21-24% |
| Obese |
31-34% |
25-29% |
| Very High Risk |
35%+ |
30%+ |
Health “Experts” Use Wrong Metric to Study Obesity
08/02/2006: Thomson Medstat, a health care research house, is reporting a study that shows 75% of obese people claim to have healthy eating habits, and 40% claim to do rigorous exercise at least three times per week.
I will be the first to admit that obesity is a serious problem in America, as it is contributing to a myriad of health problems–diabetes, high blood pressure, heart disease–that affect both the young and the old. I’ll also concede that there is a tendency among the obese to blame other factors besides behavioral matters for their condition. (I’ve been there.)
However, I must take issue with the study in one respect: the firm used Body Mass Index (BMI) as the criterion for obesity. The BMI is a piss-poor metric, as many athletes–with less than 10% body fat–can have a BMI that indicates obesity. That is because body mass includes muscle, which is more abundant in athletes–or physically active people in general–than in sedentary people.
By using BMI to define obesity, researchers could be overstating the prevalence of obesity. (Perhaps this is by design, as such inflation of statistics will lead to more federal funding for anti-obesity programs.) In fact, The BMI was never designed as a tool for the medical diagnosis of obesity.
That said, a better metric for determining obesity is body fat percentage.
I suggest using the standards developed by the American Council on Exercise:
Personally, I think those metrics are too loose, but they’re a better measure of obesity than BMI. If it were up to me, I’d recommend the following: