A Comparison of Pelvic, Spine Angle and Buttock Pressure in Various Cross-legged Sitting Postures
다양한 다리 꼬아 앉은 자세에 따른 골반과 척추 각도 및 볼기 압력 비교

Sun-Young Kang, Seung-Hyeon Kim, Soon-Jae Ahn, Young-Ho Kim, Hye-Seon Jeon
2012 Physical Therapy Korea  
1) The purpose of this study was to investigate the kinematic and kinetic changes that may occur in the pelvic and spine regions during cross-legged sitting postures. Experiments were performed on sixteen healthy subjects. Data were collected while the subject sat in 4 different sitting postures for 5 seconds: uncrossed sitting with both feet on the floor (Posture A), sitting while placing his right knee on the left knee (Posture B), sitting by placing right ankle on left knee (Posture C), and
more » ... e (Posture C), and sitting by placing right ankle over the left ankle (Posture D). The order of the sitting posture was random. The sagittal plane angles (pelvic tilt, lumbar A-P curve, thoracic A-P curve) and the frontal plane angles (pelvic obliquity, lumber lateral curves, thoracic lateral curves) were obtained using VICON system with 6 cameras and analyzed with Nexus software. The pressure on each buttock was measured using Tekscan. Repeated one-way analysis of variance (ANOVA) was used to compare the angle and pressure across the four postures. The Bonferroni's post hoc test was used to determine the differences between upright trunk sitting and cross-legged postures. In sagittal plane, cross-legged sitting postures showed significantly 통신저자: 전혜선 hyeseonj@yonsei.ac.kr 한국전문물리치료학회지 제19권 제1호 PTK Vol. 19 No. 1 2012. -2 -greater kyphotic curves in lumbar and thoracic spine when compared uncrossed sitting posture. Also, pelvic posterior tilting was greater in cross-legged postures. In frontal plane, only height of the right pelvic was significantly higher in Posture B than in Posture A. Finally, in Posture B, the pressure on the right buttock area was greater than Posture A and, in Posture C, the pressure on the left buttock area was greater than Posture A. However, all dependent variables in both planes did not demonstrate any significant difference among the three cross-legged postures (p>.05). The findings suggest that asymmetric changes in the pelvic and spine region secondary to the prolonged cross-legged sitting postures may cause lower back pain and deformities in the spine structures.
doi:10.12674/ptk.2012.19.1.001 fatcat:wb3b7mhe2rg2jgyy6qsrtilfbe