Scaling of human body mass with height: the Body Mass Index revisited

Abstract

We adapt a biomechanical argument of Rashevsky, which places limits on the stress experienced by a torso supported by the legs, to deduce that body mass $m$ of growing children should scale as the $p$th power of height $h$ with $7/3<p<8/3$. Further arguments based on stability and heat loss suggest that $p$ should be close to 8/3. The arguments are extended to suggest that waist circumference $w$ should scale as $h^q$ with $q$ near the lower end of $2/3\le q\le 1$. Data from Hong Kong and British children are consistent with these hypotheses.

6 pages, to appear in J. Biomechanics

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