Early Human Development
Using a cross-sectional design, this study quantified the relationship between the digit ratio (2D:4D) and muscular strength in 57 adolescent boys. 2D:4D was very likely a moderate negative correlate of handgrip strength, even after adjustment for age and body size. This result may reflect the organizational benefits of prenatal testosterone.
First published in Early Human Development.
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Jordan M. Tomkinson and Grant Tomkinson. "Digit ratio (2D:4D) and muscular strength in adolescent boys" (2017). Education, Health & Behavior Studies Faculty Publications. 25.