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ABC News Daily

Why we need to move beyond BMI

Feb 9, 2025
Dr. Louise Bauer, a Professor of child and adolescent health at the University of Sydney, discusses the flaws in the traditional BMI system. She explains how BMI, created nearly 200 years ago, fails to accurately represent health and obesity. Personal stories reveal the impact of BMI on body image and mental health. The conversation highlights the need for a more holistic approach to health assessments, considering factors like body composition and individual circumstances, especially for those misclassified as obese.
15:15

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Quick takeaways

  • BMI is an inadequate measure of health due to its failure to account for individual body composition variations, particularly in athletes.
  • Experiences like Willow Moscarda's illustrate the emotional and practical challenges of relying on BMI for medical decisions and treatment.

Deep dives

Critique of BMI as a Health Measurement

Body Mass Index (BMI) is a simple calculation used to classify individuals as underweight, healthy weight, or obese, but it has significant limitations. Originally designed for population studies, not for individual health assessments, BMI fails to accurately reflect body composition, particularly in cases where muscle mass is high. For example, elite athletes may have a high BMI due to muscle rather than excess fat, leading to misclassification as unhealthy. The increasing awareness of these issues is pushing the medical community to reconsider the use of BMI and explore alternative methods for evaluating health.

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