title: The influences of foot placement on lumbopelvic rhythm during trunk flexion motion.
abstract: Different standing postures could potentially influence trunk biomechanics during task performance. The current study investigated how foot placement, especially stance width and foot angle influenced lumbopelvic rhythm during sagittal trunk flexion motion. Ten participants performed pace controlled sagittally symmetric trunk flexion motions while maintaining three different stance widths and two different foot angles. The results showed the narrower stance and angled foot placement conditions generated more in-phase lumbopelvic coordination patterns during trunk flexion motions, possibly due to the reduced base of support and the associated postural stability. Findings of this study provided important information regarding the effects of foot placement on postural control and trunk biomechanics during trunk bending motions; these results suggested that foot placement could alter the motion patterns of spinal segments.
authors.affiliation: Department of Biological and Agricultural Engineering, University of California in Davis, One Shields Avenue, Davis, CA 95616, USA; Department of Industrial and Management Systems Engineering, West Virginia University, Morgantown, WV 26506, USA. Electronic address: jiezhou@ucdavis.edu.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Department of Industrial and Management Systems Engineering, West Virginia University, Morgantown, WV 26506, USA. Electronic address: xiaopeng.ning@mail.wvu.edu.
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Ning
authors.affiliation: Department of Industrial and Management Systems Engineering, West Virginia University, Morgantown, WV 26506, USA. Electronic address: bohu@mix.wvu.edu.
authors.forename: Boyi
authors.initials: B
authors.lastname: Hu
authors.affiliation: Division of Kinesiology and Health, University of Wyoming, 1000E University Ave, Laramie, WY 82071, USA. Electronic address: bdai@uwyo.edu.
authors.forename: Boyi
authors.initials: B
authors.lastname: Dai
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D005528:Foot / Q000502:physiology*; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology; D011187:Posture / Q000502:physiology*; D060726:Torso / Q000502:physiology*; D055815:Young Adult
keywords: Foot placement; Low back pain; Lumbopelvic rhythm; Postural stability