以下详细说明暂以英文提供。
Why waist-to-hip ratio matters
Where the body stores fat changes health risk more than weight alone suggests. Fat carried around the abdomen (the apple shape) is linked to insulin resistance and cardiovascular strain, while fat around the hips and thighs (the pear shape) is metabolically calmer. Dividing waist circumference by hip circumference captures that shape in one number, which is why the WHO uses WHR alongside BMI and waist size to screen for weight-related risk.
How to measure accurately
Stand relaxed and breathe normally. Wrap the tape around the waist at its narrowest point — usually just above the navel — keeping it level and snug but not compressing the skin. Then measure around the widest part of the hips and buttocks in front of a mirror to keep the tape flat. Take each measurement twice; a couple of centimeters of sloppiness can move the ratio enough to shift categories.
中国本地参考
日常计算时值得知道的中国本地规则：
- 计量的单位习惯: 住房面积用平方米，土地常用亩（1 亩 ≈ 666.7 平方米）；里程用公里，油耗用 L/100km。
- 日期与数字格式: 日期写作 2026年10月13日（年-月-日）；大数习惯用万、亿（1 万 = 10,000，1 亿 = 100,000,000）。
- 法定节假日: 全年法定节假日 11 天，春节与国庆为长假；调休安排每年由国务院办公厅发布。
- 速度与限速: 高速公路最高限速 120 km/h，城市快速路多为 80 km/h，均以公里每小时计。
- 鞋服尺码: 鞋码用中国码（毫米制），服装常用 155/80A 这类身高围度组合，与欧美码不同。
数据核对：2026 年 10 月
常见问题
Is WHR better than BMI?
They measure different things. BMI reflects overall weight for height but cannot see where fat sits; WHR reflects fat distribution but ignores total mass. Together they screen better than either alone.
Why do the thresholds differ for men and women?
Healthy fat distribution differs by sex: women naturally carry a larger share of fat around the hips. A ratio that is unremarkable for a man can flag abdominal risk for a woman, so the WHO uses different cutoffs.
Can I lower my WHR?
Usually yes. Abdominal fat responds to the same levers as other fat — a modest calorie deficit, regular activity, sleep, and alcohol in moderation — and spot-reduction myths aside, overall fat loss tends to shrink the waist first.