title: Occupation, participation, inclusion, work role postural control in different load handling tasks.
abstract: BACKGROUND
  Manual material handling has been attributed as a major risk to human musculoskeletal system. Workers postural stability in these tasks is influenced by holding method, time and weight being handled.
  
  
  OBJECTIVE
  The study attempts to investigate postural balance in five different commonly adopted load handling methods amongst female volunteers.
  
  
  METHODS
  Ten women subjects performed manual material handling tasks by lifting 9 kg load in five different ways. Lifting tasks included (1) Upfront in palms (2) on head (3) sideways (left) (4) sideways (right) and (5) in bag at back. Normalized electromyography signals (back and leg) and center of pressure displacements parameters were investigated as measures of postural control.
  
  
  RESULTS
  An increase in the medio-lateral and anterio-posterior center of pressure displacements and activity of back muscles was reported when subjects lifted the weight directionally.
  
  
  CONCLUSIONS
  There was a significant influence of load position on center of pressure displacements and muscle activity and thereby on postural stability.
  
  
  BACKGROUND
  Balance; center of pressure; electromyography.
authors.affiliation: National Institute of Occupational Health, Ahmedabad, India.
authors.forename: Pranab
authors.initials: P
authors.lastname: Nag
authors.affiliation: National Institute of Occupational Health, Ahmedabad, India.
authors.forename: Anjali
authors.initials: A
authors.lastname: Nag
authors.affiliation: National Institute of Occupational Health, Ahmedabad, India.
authors.forename: Heer
authors.initials: H
authors.lastname: Vyas
authors.affiliation: National Institute of Occupational Health, Ahmedabad, India.
authors.forename: Priyanka
authors.initials: P
authors.lastname: Shah
mesh_terms: D000328:Adult; D001415:Back / Q000502:physiology*; D004576:Electromyography; D005260:Female; D006801:Humans; D017770:Lifting; D004856:Postural Balance / Q000502:physiology; D011187:Posture / Q000502:physiology; D013647:Task Performance and Analysis; D016474:Weight-Bearing / Q000502:physiology*
keywords: Balance; center of pressure; electromyography