title: Distinct trajectories of light and moderate to vigorous physical activity in heart disease patients: results from the Activity Correlates afTer cardIac hospitalizatiON (ACTION) trial.
abstract: OBJECTIVE
  Research suggests that light and moderate to vigorous physical activity (MVPA) has beneficial effects concerning longevity in heart disease patients. Yet, very little is known about the physical activity trajectories of patients who do not attend cardiac rehabilitation programs and whether the demographic/clinical predictors of these trajectories are similar for light and MVPA.
  
  
  METHODS
  Longitudinal.
  
  
  METHODS
  Patients (N=269) completed a questionnaire assessing demographic, clinical, and physical activity variables at baseline, three, six, nine, and 12 months after hospitalization for heart disease. Charts were reviewed for height, weight and clinical diagnosis.
  
  
  RESULTS
  Latent class growth analyses showed two classes of patients emerged for light physical activity (i.e., patients who remained inactive and patients whose physical activity levels significantly declined) and MVPA (i.e., patients whose physical activity significantly increased and patients whose activity levels significantly decreased). Light intensity class membership was predicted by diagnosis (OR=2.22), whereas MVPA class membership was predicted by gender (OR=.15). Finally, dual trajectory analyses showed that patients whose activity levels declined for one intensity had a high probability of transitioning into the declining group for the other intensity.
  
  
  CONCLUSIONS
  Physical activity trajectories for heart disease patients vary as a function of intensity as do the demographic/clinical predictors of these trajectories.
authors.affiliation: Dalhousie University, Centre for Clinical Research, Canada. Electronic address: chris.blanchard@dal.ca.
authors.forename: Chris M
authors.initials: CM
authors.lastname: Blanchard
authors.affiliation: Dalhousie University, Environmental Science Program, Canada. Electronic address: jmcswee@dal.ca.
authors.forename: Jill
authors.initials: J
authors.lastname: McSweeney
authors.affiliation: Dalhousie University, Department of Medicine, Division of Cardiology, Canada. Electronic address: Nicholas.giacomantonio@cdha.nshealth.ca.
authors.forename: Nicholas
authors.initials: N
authors.lastname: Giacomantonio
authors.affiliation: Minto Prevention and Rehabilitation Centre, Ottawa Heart Institute, Canada. Electronic address: breid@ottawaheart.ca.
authors.forename: Robert D
authors.initials: RD
authors.lastname: Reid
authors.affiliation: Behavioral Medicine Laboratory, Faculty of Education, University of Victoria, Canada. Electronic address: Rhodes@uvic.ca.
authors.forename: Ryan E
authors.initials: RE
authors.lastname: Rhodes
authors.affiliation: University of Alberta, Faculty of Physical Education and Recreation, Canada. Electronic address: jc.spence@ualberta.ca.
authors.forename: John C
authors.initials: JC
authors.lastname: Spence
authors.affiliation: University of Prince Edward Island, School of Nursing, Canada. Electronic address: dmurnaghan@upei.ca.
authors.forename: Donna
authors.initials: D
authors.lastname: Murnaghan
authors.affiliation: Laurentian University, Faculty of Human Kinetics, Canada. Electronic address: kmcgannon@laurentian.ca.
authors.forename: Kerry
authors.initials: K
authors.lastname: McGannon
mesh_terms: D000368:Aged; D015444:Exercise; D005260:Female; D006331:Heart Diseases / Q000534:rehabilitation*; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D012737:Sex Factors
keywords: Heart disease; Intensity; Physical activity trajectories