title: Development of a set of equations describing joint trajectories during para-sagittal lifting.
abstract: Given a lifting task with predetermined starting and ending positions, the angular trajectories are usually very consistent with a distinctive pattern. This paper derives a set of equations that can describe the joint trajectories during a para-sagittal lifting task. Three optimal motion patterns were also expressed by the polynomials: minimal hand jerk, minimal center of gravity (CG) jerk, and minimal muscle utilization rate (MUR). The variability of the joint movements were synthesized by overlapping the optimal patterns.
authors.affiliation: Liberty Mutual Research Center for Safety and Health, Hopkinton, MA 01748, USA. simon.hsiang@libertymutual.com
authors.forename: S M
authors.initials: SM
authors.lastname: Hsiang
authors.forename: C C
authors.initials: CC
authors.lastname: Chang
authors.forename: R W
authors.initials: RW
authors.lastname: McGorry
mesh_terms: D000328:Adult; D000465:Algorithms; D003198:Computer Simulation; D006801:Humans; D007596:Joints / Q000502:physiology*; D017770:Lifting; D008297:Male; D008954:Models, Biological; D004856:Postural Balance / Q000502:physiology; D011187:Posture / Q000502:physiology; D015203:Reproducibility of Results; D016474:Weight-Bearing / Q000502:physiology*