The Effectiveness of a Web-Based Computer-Tailored Physical Activity Intervention Using Fitbit Activity Trackers:...

Area of Science:

• Digital health interventions
• Behavioral science and technology
• Exercise physiology

Background:

• Web-based interventions offer personalized physical activity advice.
• Self-reported physical activity data can be inaccurate due to overreporting.
• This limitation may reduce the effectiveness of tailored advice.

Purpose of the Study:

• To determine if integrating Fitbit activity trackers improves web-based intervention effectiveness.
• To compare a tailored intervention with and without Fitbit tracker integration.
• To assess the impact on physical activity, sitting time, and BMI.

Main Methods:

• 243 Australian adults received a 3-month web-based intervention (TaylorActive).
• Participants were randomized to receive the intervention with or without Fitbit integration.
• Outcomes measured included physical activity, sitting time, BMI, advice acceptability, usability, and module completion.

Main Results:

• The Fitbit group showed significant increases in total and moderate-to-vigorous physical activity.
• The Fitbit group reported higher advice acceptability and website usability.
• Participants in the Fitbit group completed more intervention modules (4.4 vs. 2.9).

Conclusions:

• Integrating physical activity trackers enhances web-based intervention effectiveness.
• Fitbit integration improves user engagement and adherence to digital health programs.
• Wearable technology can overcome self-reporting limitations in digital health interventions.