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BMI (Body Mass Index)

A ratio of weight to height used to categorize body weight status.

BMI is calculated as weight (kg) divided by height squared (m²). It categorizes people as underweight (<18.5), normal (18.5-24.9), overweight (25-29.9), or obese (30+). While useful for population health studies, BMI doesn't distinguish between muscle and fat, making it unreliable for athletes and muscular individuals.

Examples

  • BMI = weight (kg) / height (m)²
  • Doesn't distinguish muscle from fat
  • Muscular people may have "obese" BMI

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