title: Reaction moment at the L5/S1 joint during simulated forward slipping with a handheld load.
abstract: The purpose of the study was to investigate the effects of load on the net moment response at the L5/S1 joint during simulated slip events. Six young individuals were instructed to take one step with a handheld load. Sudden floor movement was randomly introduced to simulate unexpected slips. Different loads conditions (0%, 10%, 20%, 30% of body weight) were introduced at random. Three-dimensional net moments at the L5/S1 joint were computed via downward inverse dynamic model. Peak joint moment generated at 30% load level was found to be significantly higher compared to no-load condition. No peak moment differences were found among no-load, 10% or 20% load levels. Additionally, the findings from this study indicated a flexiondominant net L5/S1 joint moment pattern during motion phase associated with slip-induced falls.
authors.affiliation: Division of Applied Science and Technology, Marshall University, Huntington, WV, USA.
authors.forename: Jian
authors.initials: J
authors.lastname: Liu
authors.affiliation: Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, USA.
authors.forename: Thurmon
authors.initials: T
authors.lastname: Lockhart
authors.affiliation: Research Institute of Physical Education, Chonbuk National University, Jeonju, Jeollabuk-do, Republic of Korea. rockwall@jbnu.ac.kr.
authors.forename: Sukwon
authors.initials: S
authors.lastname: Kim
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D005260:Female; D006225:Hand; D006801:Humans; D008159:Lumbar Vertebrae / Q000502:physiology*; D008161:Lumbosacral Region / Q000502:physiology; D008297:Male; D016272:Occupational Health; D012447:Sacrum / Q000502:physiology*; D016138:Walking / Q000502:physiology*; D016474:Weight-Bearing / Q000502:physiology*