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BMI Information Tables
Understanding Body Mass Index categories, health risks, and recommendations
Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight, and obesity in adults. It is defined as a person’s weight in kilograms divided by the square of their height in meters (kg/m²).
BMI Categories and Information
| Category | BMI Range | Health Risk |
|---|---|---|
| Underweight | < 18.5 | High |
| Normal weight | 18.5 – 24.9 | Low |
| Overweight | 25 – 29.9 | Moderate |
| Obesity Class I | 30 – 34.9 | High |
| Obesity Class II | 35 – 39.9 | Very High |
| Obesity Class III | ≥ 40 | Extremely High |
This table shows the standard BMI categories established by the World Health Organization. Maintaining a BMI in the normal weight range is associated with the lowest health risks.
| BMI Category | Potential Health Risks |
|---|---|
| Underweight | Malnutrition, osteoporosis, decreased immunity |
| Normal weight | Lowest risk of weight-related health issues |
| Overweight | Increased risk of heart disease, type 2 diabetes |
| Obesity Class I | High blood pressure, sleep apnea, gallbladder disease |
| Obesity Class II | Severe health risks, coronary heart disease |
| Obesity Class III | Multiple health conditions, significantly reduced life expectancy |
This table outlines the health risks associated with different BMI categories. It’s important to note that BMI is just one indicator of health and should be considered alongside other factors.
| BMI Category | Recommended Action |
|---|---|
| Underweight | Consult doctor, balanced nutrition, strength training |
| Normal weight | Maintain weight, regular exercise, balanced diet |
| Overweight | Moderate weight loss, increase physical activity |
| Obesity Class I | Weight loss program, medical supervision |
| Obesity Class II | Medical intervention, structured weight loss plan |
| Obesity Class III | Comprehensive medical treatment, possible surgery |
This table provides general recommendations based on BMI categories. Always consult with a healthcare professional before starting any weight management program.
Important Note: While BMI is a useful screening tool, it does have limitations. It may not accurately reflect body fat distribution or muscle mass. Athletes with high muscle mass may have a high BMI but not have excess body fat. Always consult with a healthcare provider for a comprehensive health assessment.
Body Mass Index (BMI) is a simple calculation that estimates whether your weight is in a healthy range for your height. It applies to adults aged 20 and older and classifies results into underweight, healthy weight, overweight, and obesity (with three obesity classes). While BMI is a useful screening tool, it doesn’t measure body fat directly or account for muscle mass, bone density, or overall body composition. Use this calculator as a starting point, and discuss your results with a healthcare professional for a complete picture of your health.
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