Related Experiment Video
Updated: Mar 6, 2026

Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine
Published on: October 27, 2016
Linear discriminant analysis for symmetric lifting recognition of skilled logistic experts by center of pressure
Goal:
The main purpose of the present study was to propose a recognizing method to analyze characteristics of symmetric lifting of skilled logistic experts by center of pressure (CoP) trajectories. Although it has been known that good posture helps reduce the intradiscal loads on lumbar discs, the most significant problem was that most of logistic workers did not know whether the current posture was proper or not.
Methods:
The experiment of lifting was performed three times under 18 kg loads with closed eyes. Six skilled logistic experts and six unskilled beginners were participated in. The linear discriminant analysis (LDA) was designed by seven indices which were derived from measured CoP trajectories with the Wii Balance Board. The strong point of experimental system was practical, reliable, and cheap.
Results:
As a result, it was found that the designed LDA discriminated difference of symmetric lifting between skilled experts and unskilled beginners with the error rate of 0.005.
Discussion:
It was discussed that not only most of unskilled beginners had mainly characteristics of poor lifting posture, but also the proposed method showed a high possibility to self-evaluate the symmetric lifting in order to check whether the current posture of logistic worker is proper or not.
Related Concept Videos
Relative Motion Analysis using Rotating Axes-Problem Solving
Here, in order to determine the magnitude of velocity and acceleration for point...
Finding the Center of Gravity
Significance of Center of Mass
Relative Motion Analysis using Rotating Axes
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
Center of Gravity
To determine its location, the principle of moments can be utilized by dividing the object into...

