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Article
Coordination indices between lifting kinematics and kinetics
International Journal of Industrial Ergonomics
  • Xu Xu, North Carolina State University
  • Simon M. Hsiang, North Carolina State University
  • Gary Mirka, Iowa State University
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
1-1-2008
DOI
10.1016/j.ergon.2008.02.008
Abstract
During a lifting task the movement of the trunk can account for the majority of the external moment about the ankle. Though the angle of trunk flexion and the external moment about the ankles are roughly correlated, this correlation can be reduced by various segmental dynamics and momentums with the upper/lower extremities. Two methods are proposed in this technical note for describing the relationship between the kinematics and the kinetics of a lifting motion. The first relies on the phase plane analysis technique and explores the relative phase angle between the kinematic characteristics of lifting motion (i.e., trunk motion in the sagittal plane) and the kinetic characteristics of lifting motion (i.e., the net external moment). The second technique employs the moving correlation technique that assesses the level of coordination between the net external moment and the angle of the torso in the sagittal plane. In this paper, these methods are applied to a dataset of lifting motions of obese and normal weight participants to explore the utility of these modeling approaches on the assessment of potential risk in the lifting task due to obesity.
Comments

This is a manuscript of an article published as Xu, Xu, Simon M. Hsiang, and Gary A. Mirka. "Coordination indices between lifting kinematics and kinetics." International Journal of Industrial Ergonomics38, no. 11 (2008): 1062-1066. doi: 10.1016/j.ergon.2008.02.008. Posted with permission.

Creative Commons License
Creative Commons Attribution-Noncommercial-No Derivative Works 4.0
Copyright Owner
Elsevier, B.V.
Language
en
File Format
application/pdf
Citation Information
Xu Xu, Simon M. Hsiang and Gary Mirka. "Coordination indices between lifting kinematics and kinetics" International Journal of Industrial Ergonomics Vol. 38 Iss. 11-12 (2008) p. 1062 - 1066
Available at: http://works.bepress.com/gary_mirka/25/