What this means
This is a planned study of a phone app that uses Fitbit data and AI chats each day. It has not finished, so we do not yet know if it helps thinking or movement.
Plain-English summary written by an AI model from the registry listing.
- Status
- Recruiting
- Who can join
- Ages 65–93 · 300 healthy adults aged 65 and older (planned)
- Where
- 1 site
The science
- Registered title
- A Randomized Controlled Trial of a Multi-domain Smartphone Intervention Incorporating Generative AI for Healthy Older Adults
- Trial ID
- NCT07524478 ↗
- Phase
- Not applicable
- Study type
- interventional
- Conditions
- Healthy Longevity
- What is tested
- Multidomain intervention, Control
- Sponsor
- Tatsuhiro Hisatsune
- Ages
- 65 Years to 93 Years
- Dates
- First posted Apr 13, 2026 · updated Apr 16, 2026
Registry summary
This study evaluates the efficacy of a smartphone-based multi-domain intervention designed to promote healthy aging and prevent cognitive decline in older adults. Building on preliminary findings that automated alerts improved exercise, sleep and nutrition-thereby mediating enhanced cognitive performance-we developed a dedicated application that integrates longitudinal Fitbit data (activity, sleep, and nutrition) with daily interactive dialogues powered by Generative AI (LLM).
A six-month Randomized Controlled Trial (RCT) will be conducted with 300 healthy participants aged 65 and older. The primary objective is to analyze how these digital interventions influence health outcomes, particularly cognitive and motor functions. Furthermore, we aim to construct a predictive mathematical model to estimate health states based on wearable data streams. Finally, the study will assess the potential for scalability to facilitate the large-scale social implementation of this digital health service.
Sites (1)
- GSFS, The University of Tokyo, Kashiwa, Chiba, Japan