title: Chin-up-induced bilateral anterior shoulder dislocation: a case report.
abstract: BACKGROUND
  Simultaneous bilateral shoulder dislocations are extremely rare occurrences.
  
  
  OBJECTIVE
  We present an unusual case where the patient suffered simultaneous bilateral anterior shoulder dislocations during chin-up exercises. To our knowledge, this mechanism has not been previously reported.
  
  
  METHODS
  A 44-year-old woman presented to the Emergency Department (ED) complaining of bilateral shoulder pain while doing chin-up exercises. She was completing her workout when she developed severe pain to both of her shoulders with associated parasthesias to both hands and the right forearm. The patient was found to have bilateral anterior shoulder dislocations; both were reduced using procedural sedation and traction-countertraction techniques.
  
  
  CONCLUSIONS
  The mechanics of chin-up exercises places the glenohumeral joint in a position of instability, increasing the likelihood of dislocation.
authors.affiliation: Department of Emergency Medicine, Morristown Memorial Hospital, 100 Madison Avenue, Box 8, Morristown, NJ 07962-1965, USA.
authors.forename: Howard
authors.initials: H
authors.lastname: Felderman
authors.forename: Richard
authors.initials: R
authors.lastname: Shih
authors.forename: Victor
authors.initials: V
authors.lastname: Maroun
mesh_terms: D000328:Adult; D001265:Athletic Injuries / Q000209:etiology*; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D010292:Paresthesia / Q000209:etiology; D055070:Resistance Training / Q000009:adverse effects*; D012783:Shoulder Dislocation / Q000209:etiology*