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Updated: Feb 14, 2026
05:59
Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
Published on: March 7, 2019
7.3K
Patterns of Fitbit Use and Activity Levels Throughout a Physical Activity Intervention: Exploratory Analysis from a
Sheri J Hartman1,2, Sandahl H Nelson1,2, Lauren S Weiner1,2
1Department of Family Medicine and Public Health, University of California San Diego, La Jolla, CA, United States.
JMIR Mhealth and Uhealth
|February 7, 2018
Summary
High adherence to wearing activity trackers like Fitbit correlates with increased moderate to vigorous physical activity (MVPA). Regularly checking tracker data, but not app data, was linked to MVPA improvements in breast cancer survivors.
Area of Science:
- Behavioral science
- Health technology
- Exercise physiology
Background:
- Technology-based activity trackers are increasingly used for behavior change.
- Understanding daily tracker usage and its impact on physical activity is limited.
Purpose of the Study:
- To examine Fitbit usage patterns and activity levels.
- To investigate the relationship between tracker use and intervention success, measured by moderate to vigorous physical activity (MVPA).
Main Methods:
- 42 female breast cancer survivors participated in a 12-week physical activity intervention.
- Participants wore Fitbit One daily; ActiGraph accelerometers measured MVPA at baseline and week 12.
- Self-reported frequency of checking Fitbit data (tracker, app, website) was collected.
Main Results:
- High Fitbit wear adherence (mean 88.13%) was associated with increased MVPA.
- Participants averaged 182.6 min/week of MVPA, with significant weekly variations.
- Checking tracker data daily or more was linked to MVPA changes, unlike checking app/website data.
Conclusions:
- This study explores the link between commercial activity tracker use and physical activity intervention outcomes.
- Understanding user engagement with trackers can enhance their effectiveness in promoting behavior change.
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