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When BMI Is Misleading — Accuracy Limits
Published May 1, 2026
BMI is cheap population screening: weight divided by height squared. It ignores body composition, fat distribution, bone density, and ethnicity-specific risk thresholds.
Who should interpret cautiously
- Strength athletes with high lean mass.
- Older adults losing muscle (sarcopenic obesity).
- Pregnant people and children (use pediatric percentiles instead).
Pair BMI with waist circumference trends and clinical advice. Compute BMI on the BMI Calculator and energy needs on the Calorie Counter.