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A randomized trial of sequential and simultaneous multiple behavior change interventions for physical activity and
Corneel Vandelanotte1, Marina M Reeves, Johannes Brug
1Cancer Prevention Research Centre, School of Population Health, Level 3, Public Health Building, The University of Queensland, Herston Road, Herston Queensland 4006, Australia. c.vandelanotte@uq.edu.au
Preventive Medicine
|August 21, 2007
Summary
Simultaneous or sequential interventions effectively promote multiple health behavior changes, including physical activity and fat intake reduction. Overweight individuals may be more motivated to adopt healthier habits.
Area of Science:
- Behavioral Science
- Public Health Interventions
- Health Psychology
Background:
- Achieving multiple behavior changes remains a significant challenge in health promotion.
- Computer-tailored interventions are increasingly used to promote lifestyle modifications.
- Understanding the optimal delivery method for simultaneous behavior change interventions is crucial.
Purpose of the Study:
- To compare the effectiveness of simultaneous versus sequential computer-tailored interventions for promoting physical activity (PA) and reducing fat intake (FI).
- To identify factors influencing successful multiple behavior change.
Main Methods:
- A randomized controlled trial with 567 participants assigned to simultaneous or sequential PA and FI interventions.
- Successful behavior change defined as >60 min PA increase and/or 5% FI reduction at 6 months.
- Multinomial logistic regression used to analyze intervention mode, gender, age, BMI, and education's impact on behavior change.
Main Results:
- 33.5% of participants successfully changed both behaviors; 30.5% reduced FI; 15.8% increased PA.
- Intervention mode, gender, and age were not significantly associated with successful behavior change.
- Overweight/obese participants were more likely to achieve FI reduction (OR=1.85) and dual behavior change (OR=2.13); lower education was linked to dual change (OR=2.46).
Conclusions:
- Both simultaneous and sequential intervention modes are effective for multiple behavior change.
- Being overweight may serve as a motivator for adopting healthier behaviors.
- Intervention timing does not appear to be a critical factor in achieving combined physical activity and dietary changes.
