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Using Continuous Glucose Monitoring as a Biological Feedback Strategy to Motivate Physical Activity in Cancer
Yue Liao1, Grace E Brannon2, Chad D Rethorst3
1Department of Kinesiology, University of Texas at Arlington, Arlington, TX, USA.
Cancer Control : Journal of the Moffitt Cancer Center
|July 28, 2025
Summary
This study found that personalized text messages using activity tracker and continuous glucose monitor (CGM) data increased physical activity motivation in cancer survivors. The intervention was well-accepted and showed positive changes in motivation stages.
Area of Science:
- Exercise Science
- Behavioral Medicine
- Biomedical Engineering
Background:
- Most cancer survivors are not physically active enough for health benefits.
- Biological feedback is a promising technique for increasing physical activity.
- Novel strategies are needed to motivate cancer survivors' physical activity.
Purpose of the Study:
- To test the acceptability of a pilot intervention using personalized feedback.
- To assess changes in physical activity motivation among cancer survivors.
- To evaluate a 4-week intervention combining activity tracker and continuous glucose monitor (CGM) data.
Main Methods:
- A mixed-methods approach was used with 12 breast and colorectal cancer survivors.
- Participants used a Fitbit and CGM, receiving personalized text messages based on their data.
- Surveys and exit interviews assessed motivation and intervention acceptability.
Main Results:
- The intervention, including devices and glucose-based feedback, was highly acceptable.
- Participants showed a significant shift from preparation to action/maintenance stages of physical activity.
- Qualitative data confirmed positive changes in participants' physical activity motivation.
Conclusions:
- Combining CGM with activity trackers offers a viable method for motivating physical activity in cancer survivors.
- Personally relevant biological feedback via text messages can enhance motivation.
- Future research should explore this technique's impact on behavior change and health outcomes.
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