title: Sitting balance and effects of kayak training in paraplegics.
abstract: OBJECTIVE
  The objectives of this study were to evaluate biomechanical variables related to balance control in sitting, and the effects of kayak training, in individuals with spinal cord injury.
  
  
  METHODS
  Twelve individuals with spinal cord injury were investigated before and after an 8-week training period in open sea kayaking, and 12 able-bodied subjects, who did not train, served as controls.
  
  
  METHODS
  Standard deviation and mean velocity of centre of pressure displacement, and median frequency of centre of pressure acceleration were measured in quiet sitting in a special chair mounted on a force plate.
  
  
  RESULTS
  All variables differed between the group with spinal cord injury, before training, and the controls; standard deviation being higher and mean velocity and median frequency lower in individuals with spinal cord injury. A significant training effect was seen only as a lowering of median frequency.
  
  
  CONCLUSIONS
  The results indicate that individuals with spinal cord injury may have acquired and consolidated an alternative strategy for balance control in quiet sitting allowing for only limited further adaptation even with such a vigorous training stimulus as kayaking.
authors.affiliation: Biomechanics and Motor Control Laboratory, Department of Sport and Health Sciences, University College of Physical Education and Sports, Stockholm, Sweden. anatoli.grigorenko@ihs.se
authors.forename: Anatoli
authors.initials: A
authors.lastname: Grigorenko
authors.forename: Anna
authors.initials: A
authors.lastname: Bjerkefors
authors.forename: Hans
authors.initials: H
authors.lastname: Rosdahl
authors.forename: Claes
authors.initials: C
authors.lastname: Hultling
authors.forename: Marie
authors.initials: M
authors.lastname: Alm
authors.forename: Alf
authors.initials: A
authors.lastname: Thorstensson
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D005081:Exercise Therapy / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D004856:Postural Balance / Q000502:physiology*; D013119:Spinal Cord Injuries / Q000534:rehabilitation*; D013177:Sports / Q000502:physiology