Sitting‑height Ratio Mirrors Ancestry Gradient

Large GWAS‑scale samples show that the fraction of height in the torso (sitting‑height ratio) is not uniform: African, South Asian, European, and East Asian ancestry groups fall along a consistent ordering, with East Asians having relatively longer torsos. The result is detectable in UK Biobank and China Kadoorie Biobank and invites investigation of genetic versus developmental (nutrition, disease, climate) causes. — This empirical pattern sharpens debates about how much population differences in body form reflect genetics versus environment and could influence conversations about biology, public health, ergonomics, and the political uses of anthropometry.