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Coming to grips with economic development: Variation in adult hand grip strength during health transition in Vanuatu.

Kathryn M. Olszowy,M. A. Little,Gwang Lee,A. Pomer,K. Dancause,Cheng Sun,Harold Silverman,Chim W. Chan,L. Tarivonda,Akira Kaneko,C. Weitz,J. Koji Lum,R. Garruto

Published 2018 in American Journal of Physical Anthropology

ABSTRACT

OBJECTIVES To determine whether (1) maximal handgrip strength (HGS) is associated with inter-island level of economic development in Vanuatu, (2) how associations between island of residence and HGS are mediated by age, sex, body size/composition, and individual sociodeomographic variation, and (3) whether HGS is predictive of hypertension. MATERIAL AND METHODS HGS was collected from 833 adult (aged 18 and older) men and women on five islands representing a continuum of economic development in Vanuatu. HGS was measured using a handheld dynamometer. Participants were administered in an extensive sociobehavioral questionnaire and were also assessed for height, weight, percent body fat, forearm skinfold thickness, forearm circumference, and blood pressure. RESULTS HGS was significantly greater in men than in women regardless of island of residence. HGS was also significantly positively associated with inter-island level of economic development. Grip strength-to-weight ratio was not different across islands except in older individuals, where age-related decline occurred primarily on islands with greater economic development. HGS significantly declined with age in both men and women. CONCLUSION HGS is positively associated with modernization in Vanuatu, but the relationship between HGS and modernization is largely due to an association of both variables with increased body size on more modernized islands. Further research on the role of individual variation in diet and physical activity are necessary to clarify the relationship between HGS and modernization.

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