Obesity is classified based on Body Mass Index or BMI. Calcuated using a person's weight relative to their height using a formula, BMI provides a reliable indicator of obesity for most people and is used to screen for weight categories that may lead to health problems.
Adult BMI Categories
Underweight < BMI of 18.5 Normal BMI of 18.5-24.9 Overweight BMI of 25.0-29.9 Obesity (class 1)BMI of 30-34.9 or >20% over ideal body weight Severe obesity (class 2)BMI of 35-39.9 or >100% over ideal body weight Severe obesity (class 3)BMI of 40-49.9 over ideal body weight Superobesity BMI of >50 >250% over ideal body weight.
What causes extreme obesity?
According to Dr Prab R. Tumpati, MD, founder of WikiMD, and W8MD medical weight loss centers of America, insulin resistance plays a major role in causing obesity. Learn more on this in the causes of weight gain and follow the science of what causes and the proven measures to treat obesity on the 52 weeks of weight and wellness videos.
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