Digit ratio (2D:4D) and handgrip strength in subjects of Han ethnicity: Impact of sex and age

Authors

  • Dapeng Zhao,

    Corresponding author
    1. Tianjin Key Laboratory of Cyto-Genetical and Molecular Regulation, College of Life Sciences, Tianjin Normal University, Tianjin, China
    2. College of Life Sciences, Northwest University, Xi'an, China
    • Tianjin Key Laboratory of Cyto-Genetical and Molecular Regulation, College of Life Sciences, Tianjin Normal University, Binshui West Road 393, Xiqing District, Tianjin 300387, China
    Search for more papers by this author
  • Baoguo Li,

    1. College of Life Sciences, Northwest University, Xi'an, China
    Search for more papers by this author
  • Keli Yu,

    1. Tianjin Key Laboratory of Cyto-Genetical and Molecular Regulation, College of Life Sciences, Tianjin Normal University, Tianjin, China
    Search for more papers by this author
  • Lianbin Zheng

    1. Tianjin Key Laboratory of Cyto-Genetical and Molecular Regulation, College of Life Sciences, Tianjin Normal University, Tianjin, China
    Search for more papers by this author

Abstract

The ratio of the length of the second finger to the fourth finger (2D:4D) is considered to be a putative proxy of prenatal exposure to testosterone, and has been increasingly used as a promising tool to evaluate the impact of prenatal androgenization in humans in such traits as physical performance. In this study, for the first time, we present 2D:4D data on adult participants of Han ethnicity. We consider the sexual dimorphism of 2D:4D and handgrip strength, and also report the relationship between 2D:4D and handgrip strength of males and females. The sample consisted of 54 males and 55 females recruited from a remote village in the Qinling Mountains, China. We found sexual dimorphism of both 2D:4D and handgrip strength, i.e., males had lower 2D:4D and right-left 2D:4D than females and greater handgrip strength than females. There was a sex-specific correlation between 2D:4D and handgrip strength, i.e., 2D:4D in the right hand was negatively correlated with handgrip strength in males but not in females. This relationship may be driven by sexual selection operating on fetal programming. Am J Phys Anthropol 149:266–271, 2012. © 2012 Wiley Periodicals, Inc.

Ancillary