title: Effects of wearing a tight necktie on cervical range of motion and upper trapezius muscle activity during computer work.
abstract: OBJECTIVE
  This study examined the effects of wearing a tight necktie on cervical range of motion and upper trapezius muscle activity.
  
  
  METHODS
  Thirty computer workers were recruited. First, the active cervical ROM of the participants while wearing or not wearing a tight necktie was measured using the CROM instrument. Subsequently, upper trapezius muscle activity was measured while working at a visual display terminal with and without a tight necktie.
  
  
  RESULTS
  The neck flexion, neck extension, and lateral flexion of the subjects' cervical range of motion were significantly decreased when wearing a tight necktie compared to without it. The activity of the upper trapezius muscle significantly increased when working while wearing a tight necktie compared to without.
  
  
  CONCLUSIONS
  It is especially important for male workers to select and tie neckties appropriately in order to prevent musculoskeletal injuries induced by limitation of cervical ROM or repetitive cumulative tension increase of the upper trapezius.
authors.affiliation: Department of Occupational Therapy, The Graduate School, Yonsei University, Republic of Korea.
authors.forename: In-gyu
authors.initials: IG
authors.lastname: Yoo
authors.forename: Min-hee
authors.initials: MH
authors.lastname: Kim
authors.forename: Won-gyu
authors.initials: WG
authors.lastname: Yoo
mesh_terms: D000328:Adult; D003020:Clothing / Q000009:adverse effects*; D004576:Electromyography; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D009333:Neck / Q000502:physiology*; D019838:Neck Injuries / Q000209:etiology* / Q000517:prevention & control; D016059:Range of Motion, Articular; D056910:Republic of Korea; D014584:User-Computer Interface