Jae Ho Yu ¹, Eun Jeong Lee ¹, Jin Seop Kim ¹, Ji Heon Hong ¹, Dong Yeop Lee ¹

Affiliations
1 Department of Physical Therapy, Sun Moon University, KR

Abstract

The aim of this study is to prove that the change of pelvic tilt angle and backrest pressure according to hip joint angle in
healthy adult. Thirty healthy male and female adults consented to participate in this study. Subjects sat on the chair with
90°, 100° and 120° hip joint flexion while both the Pressure Sensors (PS) and Passive Makers (PM) were sticked to the
subjects by an examiner. In difference between the distance values of the total axis (in distance between Superior Iliac
Crest (SIC) and thigh) and the distance values of the total axis (in distance between Anterior Superior Iliac Spine (ASIS)
and thigh), there was significant value (p<.01). And in difference between the thoracic pressure and the lumbar pressure,
there was significant value (p<.001). Thus, in comparison with the subjects sitting down with a smaller hip joint angle, the
subjects sitting down with the bigger hip joint angle can be exposed to danger complaining of low back pain.

Keywords

Back Pressure, Component, Hip Joint Angle, Pelvic Tilt, Sitting Posture

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