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NCT05273437 · ClinicalTrials.gov registry record · NA
The JustWalk JITAI Study: A System Identification Experiment to Understand Just-in-Time States of Physical Activity
A NA study, sponsored by University of California, San Diego.
- Completed
- Registry status
- NA
- Development phase
- 50
- Enrollment target
NCT05273437: Completed NA study, sponsored by University of California, San Diego.
NCT05273437 is a NA study that has completed, run by University of California, San Diego. The registered enrollment target is 50 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (96% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT05273437, a NA study, has completed, sponsored by University of California, San Diego.
- COMPLETED
- Registry status
- NA
- Development phase
- 50 participants
- Enrollment target
Study Summary
The goal of this system identification experiment is to estimate and validate dynamical computational models that can be used in a future a multi-timescale model-predictive controller. System identification is an experimental approach used in control systems engineering, which uses random and pseudo-random signal designs to experimentally manipulate independent variables, with the goal of producing dynamical models that can meaningfully predict individual responses to varying provision of support. A system identification is single subject/N-of-1 experimental design, whereby each person is their own control. This 9-month system identification experiment will experimentally vary daily suggested step goals and provision of notifications meant to inspire bouts of walking during different plausible just-in-time states. Results of this system identification experiment will then enable the development a future multi-timescale model-predictive controller-driven just-in-time adaptive intervention (JITAI) intended to increase steps/day. The system identification experiment will be conducted among N=50 inactive, adults aged 21 or over who have no preexisting conditions that preclude them from engaging in an exercise program, as determined using the physical activity readiness questionnaire.
Primary Outcome
This will be measured continuously for the duration of the study via a Fitbit Versa, a wrist-worn, consumer-level activity tracker.
Interventions
- BEHAVIORAL System identification experiment for physical activity
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 50 participants |
| Start Date | 2022-04-11 |
| Est. Completion | 2023-05-15 |
| Phase | NA |
What the finished NCT05273437 record still lists
NCT05273437 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 50 participants, a relatively small participant target, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (96% lower).
The record links to 0 conditions, and to 1 intervention - of which System identification experiment for physical activity is the first listed.
NCT05273437 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT05273437 about?
NCT05273437 is a clinical study titled "The JustWalk JITAI Study: A System Identification Experiment to Understand Just-in-Time States of Physical Activity". The goal of this system identification experiment is to estimate and validate dynamical computational models that can be used in a future a multi-timescale model-predictive controller. System identification is an experimental approach used in control systems engineering, which uses random and pseudo...
What is the current status of trial NCT05273437?
This trial is currently completed. It is a NA study. The enrollment target is 50 participants. The study started on 2022-04-11. Estimated completion is 2023-05-15.
What interventions are being tested in trial NCT05273437?
The interventions under investigation include: System identification experiment for physical activity (BEHAVIORAL).
Who is sponsoring clinical trial NCT05273437?
This trial is sponsored by University of California, San Diego, which has 775 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT05273437's enrollment target sits among peer trials
50 1279th of 2000 higher than 622 of 2,000 other NA trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other NA trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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