A letter to the editor of Human Biology discussing the potential of digit ratio (2D:4D) as a childhood biomarker for endurance running in adults, based on a long-term study of Jamaican children. The study found that low 2D:4D is linked to better endurance performance, particularly in females, and suggests that 2D:4D could be a simple biomarker for prenatal testosterone effects on sports performance.
documents/EFTA00678566.pdf
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