title: Insights for Exercise Adherence From a Minimal Planning Intervention to Increase Physical Activity.
abstract: OBJECTIVE
  To test the impact of a minimal, online planning intervention on physical activity in Australian office workers.
  
  
  METHODS
  Employees were randomized to an implementation intention intervention (n = 124) or health information control group (n = 130). Measures of physical activity, past behavior, and motivation were taken at baseline and 6 weeks.
  
  
  RESULTS
  Analysis revealed both groups increased weekly physical activity sessions (intervention M = 1.12, control M = 0.78) at follow-up, but no significant difference was found between groups. Because the sample consisted of experienced exercisers, secondary analyses investigated differential effects for those who had lapsed over the previous year (nonmaintainers) and those who had maintained their previous level of activity (maintainers). For nonmaintainers, both planning and information provision successfully changed behavior, but only planning significantly increased physical activity in maintainers over the study.
  
  
  CONCLUSIONS
  Different minimal intervention approaches may be useful for preventing long-term relapse and assisting people to improve regular exercise routines. The practical and theoretical implications are discussed.
authors.affiliation: Flinders University, Adelaide, South Australia, Australia Cancer Council SA, Eastwood, South Australia, Australia Janine.chapman@flinders.edu.au.
authors.forename: Janine
authors.initials: J
authors.lastname: Chapman
authors.affiliation: The University of Adelaide, Adelaide, South Australia, Australia Colmar Brunton Research, Parkside, South Australia, Australia.
authors.forename: Marianne
authors.initials: M
authors.lastname: Campbell
authors.affiliation: Flinders University, Adelaide, South Australia, Australia Cancer Council SA, Eastwood, South Australia, Australia.
authors.forename: Carlene
authors.initials: C
authors.lastname: Wilson
mesh_terms: D000328:Adult; D001315:Australia; D015444:Exercise; D005260:Female; D015438:Health Behavior; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D033181:Information Dissemination / Q000379:methods; D008297:Male; D008875:Middle Aged; D009042:Motivation; D016272:Occupational Health; D015397:Program Evaluation; D011795:Surveys and Questionnaires
keywords: exercise adherence; health information; minimal intervention; physical activity; planning