Everyday Measurements

BMI（ボディマス指数）

定義

体重（kg）を身長（m）の二乗で割って算出されるスクリーニング指標（kg/m²）。

解説

Developed by Belgian statistician Adolphe Quetelet around 1832, BMI was intended as a population-level statistical tool, not an individual diagnostic. The WHO defines underweight as BMI below 18.5, normal weight as 18.5–24.9, overweight as 25–29.9, and obese as 30 and above. BMI does not distinguish muscle from fat and has been criticized for systematically misclassifying athletes and underestimating health risks in some ethnic groups.

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RELATED TERMS

血圧の単位

血圧は水銀柱ミリメートル（mmHg）で測定され、収縮期血圧（心臓収縮時）と拡張期血圧（心臓拡張時）の2つの値で表される（例：120/80 mmHg）。

タイヤサイズの表記

タイヤサイズは幅/偏平率 R 直径の形式（例：205/55 R16）で表記される。幅はミリメートル、偏平率は幅に対するサイドウォール高さの百分率、直径はリムサイズ（インチ）を示す。