Obesity: Causes, Diagnosis and BMI
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Questions and Answers

What is the primary characteristic of obesity?

  • A consequence of lack of physical activity
  • A condition caused by poor diet
  • A symptom of an underlying medical condition
  • A disorder of body weight regulatory systems (correct)
  • What is the main purpose of using Body Mass Index (BMI) in diagnosing obesity?

  • To measure waist circumference
  • To estimate body fat by dividing weight by height (correct)
  • To diagnose other health conditions
  • To measure body fat directly
  • What is considered a healthy weight for most adults in terms of BMI?

  • BMI below 18.5 kg/m²
  • BMI above 30 kg/m²
  • BMI between 18.5 to 24.9 kg/m² (correct)
  • BMI between 25 to 29.9 kg/m²
  • Why are athletes with large amounts of lean muscle mass excluded from BMI classification?

    <p>Because BMI does not accurately reflect their body fat</p> Signup and view all the answers

    What is the significance of measuring waist circumference (WC) in obesity diagnosis?

    <p>To reflect the amount of fat in the central abdominal area</p> Signup and view all the answers

    What is the normal waist circumference (WC) for men?

    <p>Below 94 cm</p> Signup and view all the answers

    What is the class of obesity with a BMI of 30 to 34.9 kg/m²?

    <p>Class I obesity</p> Signup and view all the answers

    What is the risk associated with excess central fat?

    <p>Increased risk of morbidity and mortality</p> Signup and view all the answers

    What is the high-risk waist circumference (WC) for women?

    <p>80-88 cm</p> Signup and view all the answers

    Study Notes

    Definition of Obesity

    • Obesity is a disorder characterized by an accumulation of excess body fat due to an imbalance between energy intake and energy expenditure.

    Diagnosis of Obesity

    • Body Mass Index (BMI) is used to estimate body fat by dividing weight (kg) by height (m²).
    • BMI categories:
      • Healthy weight: 18.5-24.9 kg/m²
      • Overweight: 25-29.9 kg/m²
      • Obese: ≥30 kg/m²
    • Exceptions: Athletes with large amounts of lean muscle mass
    • Waist circumference (WC) measurement is used to screen for obesity, reflecting central abdominal fat.
      • Normal WC: <94 cm (men), <80 cm (women)
      • High risk: 94-102 cm (men), 80-88 cm (women)
      • Very high risk: >102 cm (men), >88 cm (women)

    Classes of Obesity

    • Class I obesity: BMI 30-34.9 kg/m²

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    Description

    Learn about obesity, a disorder characterized by excess body fat, its causes, and how it's diagnosed using Body Mass Index (BMI).

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