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Study of sitting posture variations using the nose and mandible as reference points
Cranio : the Journal of Craniomandibular Practice
|July 1, 1990
Summary
Sitting posture changes over time and is influenced by observation. Awareness of being observed can instantly correct poor sitting habits, highlighting the need for context in posture assessment.
Area of Science:
- Ergonomics
- Human Factors Engineering
- Clinical Biomechanics
Background:
- Assessing typical sitting posture is crucial for understanding musculoskeletal health.
- Clinical observations of posture may be influenced by external factors.
Purpose of the Study:
- To examine average sitting posture in healthy individuals.
- To determine how sitting posture changes with duration of sitting and patient awareness.
Main Methods:
- Observed five naive patients over five minutes of relaxed sitting.
- Monitored head, neck, and upper thorax displacement.
- Assessed postural changes when patients became aware of observation.
Main Results:
- Sitting posture showed progressive anterior and inferior displacement of the head, neck, and upper thorax during relaxed sitting.
- Awareness of being observed caused instantaneous reversal of these postural changes.
Conclusions:
- Sitting posture assessment requires consideration of sitting duration.
- Patient awareness of observation significantly impacts observed posture.
- Factors like instructions and chair type also influence posture.