Differential effects of sex on upper body kinematics and kinetics during fatiguing, Asymmetric lifting.

Autor: Cardoso MR; École de kinésiologie et de loisir, Université de Moncton, Canada. Electronic address: Michelle.cardoso@umoncton.ca., Armstrong DP; Department of Kinesiology and Health Sciences, Faculty of Health, University of Waterloo, Waterloo, ON, Canada., Fischer SL; Department of Kinesiology and Health Sciences, Faculty of Health, University of Waterloo, Waterloo, ON, Canada., Albert WJ; Faculty of Kinesiology, University of New Brunswick, Fredericton, NB, Canada.
Jazyk: angličtina
Zdroj: Applied ergonomics [Appl Ergon] 2024 Apr; Vol. 116, pp. 104203. Date of Electronic Publication: 2023 Dec 14.
DOI: 10.1016/j.apergo.2023.104203
Abstrakt: This study quantified sex-specific biomechanical adaptations to fatigue in asymmetric lifting. Twenty-one females and fifteen males performed a prolonged asymmetric lifting protocol while upper body, trunk and pelvis kinematics were collected. Features of movement identified with principal component analysis, and peak joint angular velocities and moments were calculated. Sex-specific kinematic adaptations to fatigue included females adopting a 'stoop-like' lifting strategy to a greater extent than males. Additionally, females exhibited higher vertical elbow positions during load rotation, moved their body toward the destination for load deposit, and did not reduce peak right shoulder flexion velocities, in contrast to male participants. Females also had greater low back and shoulder peak normalized joint moments. When fatigued, females adopted an asymmetric lifting strategy that minimized metabolic demand as supported by smaller decreases in maximum voluntary contractions. However, females' fatigue-related adaptations increased biomechanical exposures associated with injury risk.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Crown Copyright © 2023. Published by Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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