Determining whether biomechanical variables that describe common 'safe lifting' cues are associated with low back loads.

Autor: Armstrong DP; Department of Kinesiology, Faculty of Health Sciences, University of Waterloo, Waterloo, Canada., Davidson JB; Department of Kinesiology, Faculty of Health Sciences, University of Waterloo, Waterloo, Canada., Fischer SL; Department of Kinesiology, Faculty of Health Sciences, University of Waterloo, Waterloo, Canada. Electronic address: steven.fischer@uwaterloo.ca.
Jazyk: angličtina
Zdroj: Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology [J Electromyogr Kinesiol] 2024 Apr; Vol. 75, pp. 102867. Date of Electronic Publication: 2024 Feb 02.
DOI: 10.1016/j.jelekin.2024.102867
Abstrakt: Lift technique training programs have been implemented to help reduce injury risk, but the underlying content validity of cues used within these programs is not clear. The objective of this study was to determine whether biomechanical variables, that commonly used lifting cues aim to elicit, are associated with resultant low back extensor moment exposures. A sample of 72 participants were recruited to perform 10 repetitions of a floor-to-waist height barbell lift while whole-body kinematics and ground reaction forces were collected. Kinematic, kinetic, and energetic variables representative of characteristics commonly targeted by lifting cues were calculated as predictor variables, while peak and cumulative low back moments were calculated as dependent measures. Multiple regression revealed that 56.6-59.2% of variance in low back moments was explained by predictor variables. From these regression models, generating motion with the legs (both greater hip and knee work), minimizing the horizontal distance of the body to the load, maintaining a stable body position, and minimizing lift time were associated with lower magnitudes of low back moments. These data support that using cues targeting these identified variables may be more effective at reducing peak low back moment exposures via lift training.
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.
(Copyright © 2024 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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