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Updated: May 1, 2026

Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication
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Frequency of postural changes during sitting whilst using a desktop computer--exploring an analytical methodology.

Sjan-Mari van Niekerk1, Quinette Abigail Louw, Karen Grimmer-Sommers

  • 1a Department of Physiotherapy, FNB Movement Analysis Laboratory, Faculty of Medicine and Health Sciences , University of Stellenbosch , Cape Town , South Africa.

Ergonomics
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Adolescents frequently change their sitting posture while using computers, indicating dynamic movement is common. Understanding these postural changes can help reduce musculoskeletal symptoms for computer users.

Keywords:
dynamismposture measurementsitting biomechanics

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Area of Science:

  • Ergonomics
  • Human-Computer Interaction
  • Biomechanics

Background:

  • Dynamic movement during sitting is recommended to alleviate musculoskeletal discomfort associated with prolonged seated activities.
  • Traditional ergonomics research often captures static postures, failing to quantify movement frequency and type over time.
  • A new method was developed to analyze postural changes during sitting to characterize adolescent sitting behavior during computer use.

Purpose of the Study:

  • To quantify the frequency and variability of postural changes in adolescents during computer use.
  • To establish a baseline understanding of dynamic sitting behavior in a young population.
  • To explore the relationship between sitting behavior and potential musculoskeletal symptoms.

Main Methods:

  • A repeated-measures observational study design was utilized.
  • Fifteen minutes of 3D posture data were collected from 12 high school students.
  • The number of postural changes during computer use was recorded.

Main Results:

  • Data from 11 students were analyzed.
  • Significant intra-subject variability in median and interquartile range (IQR) of postural changes was observed.
  • Results suggest frequent postural adjustments during seated computer work.

Conclusions:

  • Adolescents exhibit considerable dynamic postural variation while seated during computer activities.
  • A deeper understanding of these dynamic movements is crucial for identifying the causes of musculoskeletal symptoms in computer users.
  • This research provides a foundation for developing targeted ergonomic interventions.