Accuracy of identification of low or high risk lifting during standardized lifting situations.

Accuracy of identification of low or high risk lifting during standardized lifting situations.

Ergonomics. 2017 Nov 24;:1-24

Authors: Brandt M, Madeleine P, Samani A, Jakobsen MD, Skals S, Vinstrup J, Andersen LL

Abstract
The aim was to classify lifting activities into low and high risk categories (according to The Danish Working Environment Authority guidelines) based on surface electromyography (sEMG) and trunk inclination (tri-axial accelerometer) measurements. Lifting tasks with different weights, horizontal distance and technique were performed. The lifting tasks were characterized by a feature vector composed of either the 90(th), 95(th) or 99(th) percentile of sEMG activity level and trunk inclinations during the task. Linear Discriminant Analysis and a subject-specific threshold scheme were applied and lifting tasks were classified with an accuracy of 65.5-65.1%. When lifts were classified based on the subject-specific threshold scheme from low and upper back accelerometers, the accuracy reached 52.1-58.1% and 72.7-78.1%, respectively. In conclusion, the use of subject-specific thresholds from sEMG from upper trapezius and erector spinae as well as inclination of the upper trunk enabled us to identify low and high risk lifts with an acceptable accuracy.

PMID: 29171789 [PubMed - as supplied by publisher]

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