Actively Recruiting
Reminder Strategies to Improve Meal-Logging Adherence
Led by University of St.Gallen · Updated on 2026-05-05
200
Participants Needed
1
Research Sites
N/A
Total Duration
On this page
AI-Summary
What this Trial Is About
Researchers are evaluating how two different types of reminder messages affect adults aged 45 and older in logging their meals using images. The study aims to understand if reminders that emphasize losing a daily financial reward or those that provide feedback on recent logging streaks improve adherence to meal logging compared to neutral reminders. The trial also explores whether physiological patterns like heart rate changes influence how participants respond to these reminders. Participants are randomly assigned three times daily to receive one of three types of push notifications before their usual mealtimes: a loss-framed reminder about losing a financial reward, a consistency reminder showing feedback on recent meal logging, or a neutral reminder simply reminding them to log their meal. The trial lasts 28 days, during which participants photograph their meals three times a day and continuously wear a smartwatch and smart ring. A daily financial reward is given if meal logging is completed for the day. Before starting, participants attend a baseline visit for consent and device setup. Throughout the 28-day intervention, adherence to meal logging within two hours of each reminder is tracked. Researchers also collect physiological data to study its impact on reminder effectiveness. The main outcome is meal logging adherence measured at each reminder, with additional analysis of physiological moderators. The total participation time includes the initial visit and the 28-day remote monitoring period.
CONDITIONS
Brief Title
Reminder Strategies to Improve Meal-Logging Adherence
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Citizens or residents of Switzerland who are German-speaking (main place of living or employment in Switzerland)
- Age 45 years or older
- Body mass index (BMI) of 25 kg/m² or higher (overweight or obese)
- Regular access to a smartphone (iOS or Android) with a data plan
- Able to use smartphone applications
- Able to walk independently
You will not qualify if you...
- History of stroke, heart disease, renal failure, cancer, or diabetes (type 1 or type 2)
- Past vascular bypass surgery or angioplasty
- Current or planned use of glucose-lowering medications during the upcoming 4 weeks (e.g., GLP-1 receptor agonists, metformin)
- Pregnant or breastfeeding
- Relevant skin conditions at wearable placement sites (e.g., upper arm)
- BMI less than 25 kg/m² confirmed at enrollment
- Fasting plasma glucose of 7.0 mmol/L or higher and/or HbA1c of 6.5% or higher indicating newly identified type 2 diabetes; such individuals will be informed and referred to a general practitioner and excluded from the study
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - 28 days
Participants receive different types of push notifications reminding them to log their meals to improve meal-logging adherence.
Daily notifications throughout the 28-day period
Trial Site Locations
Total: 1 location
1
HOCH Health and School of Medicine, University of St. Gallen
Sankt Gallen, Canton of St. Gallen, Switzerland, 9000
Actively Recruiting
Research Team
M
Mia Jovanova, Dr.
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
RANDOMIZED
Model
SEQUENTIAL
Primary Purpose
OTHER
Number of Arms
3
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