title: Examining physical activity trajectories for people with spinal cord injury.
abstract: OBJECTIVE
  It is crucial to understand long-term leisure time physical activity (LTPA) patterns of persons with spinal cord injury (SCI) as the challenges of living with this disability heavily influence LTPA levels. The purpose of this study was to explore emerging LTPA patterns in a sample of persons with SCI over an 18-month period. In addition, the study aimed to investigate the influence of pressure ulcers, demographic variables, and theory of planned behavior (TPB) constructs on the emerging LTPA trajectories.
  
  
  METHODS
  Participants (N = 541) were enrolled in the SHAPE-SCI study and responded to questionnaires assessing LTPA, TPB constructs and demographic variables. Latent Class Growth Modeling was used to detect emerging LTPA patterns and to test the influence of important demographic and theoretical variables.
  
  
  RESULTS
  Four LTPA patterns emerged: inactive, increaser, decreaser, and stable active, representing 22%, 14%, 32%, and 32% of the sample, respectively. The presence of pressure ulcers resulted in a decline in LTPA among participants with a stable active trajectory. Finally, LTPA intentions were higher in all patterns compared to the inactive group. Injury severity, age, and years postinjury also distinguished the trajectories.
  
  
  CONCLUSIONS
  Interventions should focus on increasing individuals' intentions and should be directed toward people who are older, have more severe injuries and have been injured for longer.
authors.affiliation: School of Kinesiology and Health Studies, Queen's University, Kingston, ON. shane.sweet@queensu.ca
authors.forename: Shane N
authors.initials: SN
authors.lastname: Sweet
authors.forename: Kathleen A
authors.initials: KA
authors.lastname: Martin Ginis
authors.forename: Amy E
authors.initials: AE
authors.lastname: Latimer-Cheung
mesh_terms: D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D033182:Intention; D007899:Leisure Activities / Q000523:psychology*; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D003668:Pressure Ulcer / Q000150:complications; D011582:Psychological Theory; D012959:Socioeconomic Factors; D013119:Spinal Cord Injuries / Q000523:psychology*; D011795:Surveys and Questionnaires