Detecting spinal posture change in sitting positions with tri-axial accelerometers

Wai Yin Wong, Man Sang Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

68 Citations (Scopus)


A method of using three tri-axial accelerometers for monitoring postural changes in sitting was introduced. Subjects were requested to perform forward trunk flexion and lateral bending. A motion analysis system and a three-dimensional rotation alignment device were used to verify the measurements of the accelerometers. The precision and reliability of the accelerometers for measuring static calibration was demonstrated as ≤1° for the RMS error and 1.000 for ICC(3,1). For measurements of sitting posture, the averaged RMS difference between the measurements of the accelerometers and the motion analysis system were ≤5° for all sitting postures on the coronal and sagittal planes. The results of this study demonstrated that tri-axial accelerometers could be used for tracking spinal postural changes on the sagittal and coronal planes in the sitting positions.
Original languageEnglish
Pages (from-to)168-171
Number of pages4
JournalGait and Posture
Issue number1
Publication statusPublished - 1 Jan 2008


  • Accelerometer
  • Motion analysis system
  • Posture monitoring
  • Sitting
  • Spinal posture

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Rehabilitation


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