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Just-in-Time Adaptive Interventions to Reduce Sedentary Behavior and Promote Physical Activity in Patients With
Junchen Guo1,2, Furong Chen3, Chan Chen4
1Australasian Health Outcomes Consortium, University of Wollongong, Wollongong, NSW, Australia.
JMIR Mhealth and Uhealth
|August 7, 2026
Summary
Just-in-time adaptive interventions (JITAIs) show promise for increasing physical activity and reducing sedentary behavior in chronic disease patients. Further research is needed to confirm these effects and improve intervention design.
Area of Science:
- Digital Health
- Behavioral Science
- Chronic Disease Management
Background:
- Patients with chronic diseases face challenges in maintaining physical activity (PA) and reducing sedentary behavior.
- Mobile health technologies offer personalized support through Just-in-time adaptive interventions (JITAIs).
- Existing evidence on JITAIs for PA and sedentary behavior in chronic diseases is fragmented.
Purpose of the Study:
- To describe characteristics and design of JITAIs.
- To summarize evaluation findings on PA and sedentary behavior.
- To identify barriers and facilitators for JITAI engagement and use.
Main Methods:
- Comprehensive literature search across multiple databases (PubMed, Embase, Web of Science, CINAHL, Scopus) up to June 2025.
- Independent screening and data charting by two researchers.
- Inclusion of 14 studies evaluating JITAIs for PA and sedentary behavior.
Main Results:
- Preliminary evidence suggests JITAIs positively impact PA (6 studies) and sedentary behavior (3 studies).
- Identified barriers include usability, intrusiveness, perceived value, and privacy concerns.
- Facilitators include motivation, self-monitoring, usability, timely support, and professional endorsement.
Conclusions:
- JITAIs show preliminary potential for promoting PA and reducing sedentary behavior in chronic disease patients.
- Further large-scale, high-quality randomized controlled trials are necessary to strengthen evidence and generalizability.
