Document Type
Article
Publication Date
7-31-2017
Publication Title
Journal of Lifestyle Medicine
Abstract
BACKGROUND: Many countries are experiencing an aging workforce with women workers making up a growing proportion. Workplaces often require employees to complete lifting tasks that require the ability of the hand to grasp an implement (coupling). The National Institute for Occupational Safety and Health (NIOSH) has developed an equation for manual lifting tasks hoping to minimize the potential for a workplace back-injury related to a lifting task. The NIOSH lifting equation relies upon stress variables including a coupling factor. However, little is known regarding grip strength as related to the NIOSH lifting equation coupling factor. The purpose of this study was to investigate differences in grip strength due to gender in older adults. METHODS: The participant's (68-88 years) maximal grip (MG) strength measures were collected for each hand with a hand grip dynamometer (kg). MG scores were converted to Newtons (N), normalized to body mass, and allometrically scaled. Measures of MG were than compared between genders with an independent t-test. RESULTS: The hand grip measures of MG (kg) [male: 30.3 ± 5.6, female: 10.6 ± 3.3], MG (kg) / body mass (kg) [male: 0.35 ± 0.06, female: 0.16 ± 0.04], MG (N) / (body mass (kg)) [male: 15.1 ± 2.5, female: 6.2 ± 1.7], and MG (N) / (body height (m)) [male: 103.6 ± 18.6, female: 42.6 ± 10.6] were all significantly lower (p < 0.0001) for women than men. Regardless of how grip strength was reported, there is a strong difference in grip strength between genders in this sample. The NIOSH lifting equation does not account for varying grip strength due to aging and gender differences. CONCLUSIONS: It is recommended that grip strength variability be accounted for in the coupling factor of the NIOSH lifting equation.
Recommended Citation
Sevene, Trish Gail; Berning, Joseph; Harris, Chad; Climstein, Mike; Adams, Kent Jason; and DeBeliso, Mark, "Hand Grip Strength and Gender: Allometric Normalization in Older Adults and Implications for the NIOSH Lifting Equation" (2017). Kinesiology Faculty Publications and Presentations. 19.
https://digitalcommons.csumb.edu/kin_fac/19
Comments
Published in Journal of Lifestyle Medicine by Yonsei University Wonju College of Medicine. Available via doi: 10.15280/jlm.2017.7.2.63.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.