Understanding Waist-to-Hip Ratio
WHR = waist ÷ hip. WHO risk thresholds — men: low <0.90, moderate 0.90–0.99, high ≥1.0; women: low <0.80, moderate 0.80–0.84, high ≥0.85. WHR predicts cardiovascular disease more reliably than BMI alone because visceral fat — fat around abdominal organs — is metabolically active and drives insulin resistance, inflammation, and arterial plaque formation.
Formula & Background
A 2020 meta-analysis of 2.5 million participants found that each 0.1 increase in WHR was associated with a 20–25% higher cardiovascular event risk, independent of total body weight. This is why normal-weight individuals with high WHR (“normal-weight obesity”) can carry a higher risk profile than heavier individuals with a low WHR.
Calculation Example
Female, waist 72 cm, hip 98 cm: WHR = 72 ÷ 98 = 0.73 (Low Risk).
Male, waist 92 cm, hip 100 cm: WHR = 92 ÷ 100 = 0.92 (High Risk).
Expert Tips
- Measure waist at the narrowest point above the navel. Breathe out naturally — don’t hold your breath or suck in.
- Measure hips at the widest point of the buttocks, keeping the tape level all around.
- Monitor trends over time — reductions as small as −0.02 to −0.05 from consistent aerobic exercise are associated with measurable drops in metabolic risk markers.
- Combine WHR with absolute waist circumference: high WHR + elevated waist (men ≥40 in / women ≥35 in) = highest risk category.