title: Biomechanics of rising from a chair and walking in pregnant women.
abstract: The present study aimed to assess the changes in the pattern of rising from a chair and walking forward as pregnancy progressed. Twelve pregnant women and 10 nulliparous women were included in this study. Participants were videotaped with a digital video camera in the sagittal plane, and the coordinates of the markers attached to the subjects were identified using image analysis software. The peak trunk-flexion angle in pregnant women during rising was smaller, but the hip-extension angle during the stance phase was larger than in controls. Also, the peak horizontal and vertical velocities of the center of mass were lower, and appeared earlier, in pregnant women than in controls. During rising, pregnant women dampened the propulsion attributable to increased uterus volume, and they enhanced the forward propulsion at gait initiation. To ensure safe motion, pregnant women should not initiate gait until reaching a stable standing position after rising.
authors: Department of Physical Therapy, Faculty of Health and Social Services, Saitama Prefectural University, 380 San-nomiya, Koshigaya-shi, Saitama 343-8540, Japan. sunaga-yasuyo@spu.ac.jp
authors: Yasuyo
authors: Y
authors: Sunaga
authors: Masaya
authors: M
authors: Anan
authors: Koichi
authors: K
authors: Shinkoda
mesh_terms: D000328:Adult; D000843:Ankle Joint / Q000502:physiology; D001696:Biomechanical Phenomena; D005260:Female; D057918:Fiducial Markers; D005528:Foot / Q000502:physiology; D005684:Gait / Q000502:physiology; D006621:Hip Joint / Q000502:physiology; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D007719:Knee Joint / Q000502:physiology; D011187:Posture / Q000502:physiology*; D011247:Pregnancy / Q000502:physiology*; D011262:Pregnancy Trimester, Second / Q000502:physiology; D011263:Pregnancy Trimester, Third / Q000502:physiology; D013997:Time Factors; D060726:Torso / Q000502:physiology; D014743:Videotape Recording / Q000379:methods; D016138:Walking / Q000502:physiology*