The letter discusses a study on the relationship between digit ratio (2D:4D) and adult running speed in Jamaicans. It suggests that low 2D:4D is linked to better endurance running performance, particularly in females. The study is based on data from the Jamaican Symmetry Project, which measured 2D:4D in 1996, 2002, and 2010, and analyzed running performance in 90m and 180m races.
documents/EFTA00707033.pdf
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