Daniël Bossen*, Master of Science, Utrecht, Netherlands Cindy Veenhof, Phd, Utrecht, Netherlands Joost Dekker, PhD, Amsterdam, Netherlands Dinny De Bakker, PhD, Utrecht, Netherlands Track: Research Presentation Topic: Persuasive communication and technology Presentation Type: Poster presentation Submission Type: Single Presentation Last modified: 2012-09-12

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Background:
Despite well documented health benefits, adults with a 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.

Objective:
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 two high and two low quality studies reported non-significant findings.

Conclusion:
Our best evidence synthesis revealed that there is conflicting evidence on the effectiveness of web-based PA interventions in patients with a chronic disease.