Insights for Exercise Adherence From a Minimal Planning Intervention to Increase Physical Activity

Area of Science:

• Behavioral Science
• Public Health
• Exercise Science

Background:

• Physical inactivity is a global health concern.
• Office workers often face challenges in maintaining regular physical activity.
• Targeted interventions are needed to promote sustained physical activity in this population.

Purpose of the Study:

• To evaluate the effectiveness of a minimal, online planning intervention on physical activity levels among Australian office workers.
• To compare the impact of an implementation intention intervention against a health information control group.

Main Methods:

• Randomized controlled trial with 254 Australian office workers.
• Intervention group received an online planning intervention; control group received health information.
• Physical activity, past behavior, and motivation were measured at baseline and 6 weeks.

Main Results:

• Both groups showed increases in weekly physical activity sessions, with no significant difference between them.
• Secondary analysis revealed the planning intervention significantly increased physical activity in individuals who had previously maintained their exercise routines (maintainers).
• For individuals who had lapsed in their activity (nonmaintainers), both planning and information provision improved behavior.

Conclusions:

• Minimal online interventions can be tailored to different needs for physical activity promotion.
• Implementation intention strategies may be particularly effective for maintaining exercise in experienced exercisers.
• Findings have implications for designing scalable interventions to prevent long-term relapse and improve exercise adherence.