title: The effectiveness of self-guided web-based physical activity interventions among patients with a chronic disease: a systematic review.
abstract: BACKGROUND
  Despite well-documented health benefits, adults with a physical chronic condition do not meet the recommended physical activity (PA) guidelines. Therefore, secondary prevention programs focusing on PA are needed. Web-based interventions have shown promise in the promotion of PA behavior change. We conducted a systematic review to summarize the evidence about the effectiveness of web-based PA interventions in adults with chronic disease.
  
  
  METHODS
  Articles were included if they evaluated a web-based PA intervention and used a randomized design. Moreover, studies were eligible for inclusion if they used a non- or minimal-treatment control group and if PA outcomes measures were applied. Seven articles were included.
  
  
  RESULTS
  Three high-quality studies were statistically significant to the control group, whereas 2 high- and 2 low-quality studies reported nonsignificant findings.
  
  
  CONCLUSIONS
  Our best evidence synthesis revealed that there is conflicting evidence on the effectiveness of web-based PA interventions in patients with a chronic disease.
authors.affiliation: Paramedic Dept, Netherlands Institute for Health Services Research (NIVEL), Utrecht, Netherlands.
authors.forename: Daniël
authors.initials: D
authors.lastname: Bossen
authors.forename: Cindy
authors.initials: C
authors.lastname: Veenhof
authors.forename: Joost
authors.initials: J
authors.lastname: Dekker
authors.forename: Dinny
authors.initials: D
authors.lastname: de Bakker
mesh_terms: D000328:Adult; D002908:Chronic Disease / Q000628:therapy; D005081:Exercise Therapy; D005260:Female; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D020407:Internet; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D017063:Outcome Assessment, Health Care; D016032:Randomized Controlled Trials as Topic; D012648:Self Care