Measures of obesity (Edexcel GCSE Biology): Flashcards

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Measures of obesity
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BMI stands for

Body Mass Index

BMI formula

mass (kg)(height (m))2\frac{\text{mass (kg)}}{(\text{height (m)})^2}

BMI below 18.5

Underweight

BMI 18.5-24.9

Normal

BMI 25-29.9

Overweight

BMI 30-40

Moderately obese

BMI above 40

Severely obese

Why BMI unreliable for athletes

Muscle weighs more than fat, high BMI doesn't mean overweight

Waist-to-hip ratio formula

Waist (cm)Hip (cm)\frac{\text{Waist (cm)}}{\text{Hip (cm)}}

Higher waist-to-hip ratio means

More abdominal fat

Waist-to-hip obesity threshold: women

Above 0.85

Waist-to-hip obesity threshold: men

Above 1.0

Health risks of high waist-to-hip ratio

Heart disease, type 2 diabetes

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