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Get a Grip: Variation in Human Hand Grip Strength and Implications for Human Evolution

Bardo, Ameline, Kivell, Tracy L., Town, Katie, Donati, Georgina, Ballieux, Haiko, Stamate, Cosmin, Edginton, Trudi, Forrester, Gillian S. (2021) Get a Grip: Variation in Human Hand Grip Strength and Implications for Human Evolution. Symmetry MDPI, 13 (7). Article Number 1142. E-ISSN 2073-8994. (doi:10.3390/sym13071142) (KAR id:88873)

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Although hand grip strength is critical to the daily lives of humans and our arboreal great ape relatives, the human hand has changed in form and function throughout our evolution due to terrestrial bipedalism, tool use, and directional asymmetry (DA) such as handedness. Here we investigate how hand form and function interact in modern humans to gain an insight into our evolutionary past. We measured grip strength in a heterogeneous, cross-sectional sample of human participants (n = 662, 17 to 83 years old) to test the potential effects of age, sex, asymmetry (hand dominance and handedness), hand shape, occupation, and practice of sports and musical instruments that involve the hand(s). We found a significant effect of sex and hand dominance on grip strength, but not of handedness, while hand shape and age had a greater influence on female grip strength. Females were significantly weaker with age, but grip strength in females with large hands was less affected than those with long hands. Frequent engagement in hand sports significantly increased grip strength in the non-dominant hand in both sexes, while only males showed a significant effect of occupation, indicating different patterns of hand dominance asymmetries and hand function. These results improve our understanding of the link between form and function in both hands and offer an insight into the evolution of human laterality and dexterity.

Item Type: Article
DOI/Identification number: 10.3390/sym13071142
Additional information: Open access here
Subjects: G Geography. Anthropology. Recreation > GN Anthropology
Divisions: Divisions > Division of Human and Social Sciences > School of Anthropology and Conservation
Depositing User: Ameline Bardo
Date Deposited: 28 Jun 2021 10:27 UTC
Last Modified: 29 Jun 2021 08:54 UTC
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