title: Influence of the strap-length on the trunk motion and gait symmetry in Korean women carrying a single-strap bag.
abstract: OBJECTIVE
  The purpose of this study was to examine whether strap length influences the trunk motion and gait symmetry of the ground reaction forces while walking with a single-strap bag.
  
  
  METHODS
  Seventeen Korean women participated in this study. The kinematics of trunk motion and ground-reaction forces was recorded while the participants walked at a self-paced speed under three conditions: no bag, a short-strap bag and a long-strap bag.
  
  
  RESULTS
  The amplitude of trunk rotation on the ipsilateral side (the bag side) decreased while walking with a short-strap bag compared to walking with a long-strap bag or no bag (p< 0.05). The amplitude of trunk lateral bending toward the contralateral side and asymmetry in the mediolateral ground-reaction force significantly increased while walking with a long-strap bag compared to walking with a short-strap bag or no bag (p< 0.05).
  
  
  CONCLUSIONS
  These results demonstrate that carrying a long-strap bag during walking resulted in increased trunk lateral bending and asymmetry in the mediolateral ground-reaction forces. It is therefore important to select the correct strap length when carrying a single-strap bag to prevent musculoskeletal disorders.
authors.affiliation: Department of Rehabilitation Science, Graduate School, Inje University, Gimhae, Korea.
authors.forename: Ji Yeon
authors.initials: JY
authors.lastname: Yoon
authors.forename: Woo Taek
authors.initials: WT
authors.lastname: Lim
authors.forename: Jae Seop
authors.initials: JS
authors.lastname: Oh
mesh_terms: D000328:Adult; D044466:Asian People; D001696:Biomechanical Phenomena / Q000502:physiology; D003020:Clothing; D005260:Female; D005684:Gait / Q000502:physiology*; D006801:Humans; D009038:Motion; D059352:Musculoskeletal Pain / Q000517:prevention & control; D009141:Musculoskeletal System / Q000293:injuries; D011187:Posture / Q000502:physiology; D056910:Republic of Korea; D012782:Shoulder / Q000502:physiology*; D060726:Torso / Q000502:physiology*; D016138:Walking / Q000502:physiology*; D016474:Weight-Bearing / Q000502:physiology*