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Population-Based Randomized Controlled Trial of a Stage-Targeted Physical Activity Intervention

Marshall, Alison L., Bauman, Adrian E., Owen, Neville, Booth, Michael L., Crawford, David and Marcus, Bess H. 2003, Population-Based Randomized Controlled Trial of a Stage-Targeted Physical Activity Intervention, Annals of behavioural medicine, vol. 25, no. 3, Summer, pp. 194-202.

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Title Population-Based Randomized Controlled Trial of a Stage-Targeted Physical Activity Intervention
Author(s) Marshall, Alison L.
Bauman, Adrian E.
Owen, Neville
Booth, Michael L.
Crawford, David
Marcus, Bess H.
Journal name Annals of behavioural medicine
Volume number 25
Issue number 3
Season Summer
Start page 194
End page 202
Publisher Lawrence Erlbaum Associates
Place of publication Mahwah, NJ
Publication date 2003
ISSN 0883-6612
Keyword(s) Motor Activity
Population Surveillance
Body Mass Index
Follow-Up Studies
Middle Aged
Time Factors
Summary BACKGROUND: Intervention trials with self-selected participants have shown that mailed stage-targeted print materials can increase participation in physical activity in the short term. We examined the effects of a mailed stage-targeted print intervention designed to promote physical activity, in a random sample of adults living in a regional city.

METHOD: Participants (n = 462, 40-60 years of age) were randomly allocated to an intervention (n = 227) or control group (n = 235). Measures included validated 2-week physical activity recall and stage of motivational readiness for physical activity. The intervention consisted of a single mailing of a letter and full-color stage-targeted booklets (specific to precontemplation, contemplation, preparation, and action/maintenance) 1 week postbaseline. Follow-up interviews were conducted at 2 and 6 months postbaseline.

RESULTS: After 2 months, participants in the intervention group were significantly more likely to meet the current American College of Sports Medicine/Centers for Disease Control and Prevention recommendation for sufficient physical activity than those in the control group (adjusted odds ratio [OR] = 2.40; 95% confidence interval [CI] = 1.44-3.99). After 6 months, intervention participants who reported receiving and reading the intervention materials were significantly more likely to be meeting the sufficient physical activity criterion compared with the control group (adjusted OR = 2.03; 95% CI = 1.16-3.56).

CONCLUSIONS: The stage-targeted print intervention was effective in promoting short-term increases in physical activity and was most effective for participants who recognized and used the materials. This low-cost, generalizable intervention has demonstrated potential as a practical population-based physical activity promotion strategy. Further research is required before widespread dissemination would be justified, as additional strategies may be required to ensure sustained change.

Language eng
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2003 by The Society of Behavioral Medicine
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Created: Mon, 13 Oct 2008, 15:37:10 EST

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