Fitbit One and Text Messaging Prompts to Promote Physical Activity in Overweight/Obese Adults

Study Overview
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Brief Summary
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Previous studies suggest self-regulatory techniques including self-monitoring, and SMS text-messaging as an intervention modality, can modify health behaviors including physical activity (PA). The primary purpose of this study was to examine change in objectively measured PA in a randomized controlled pilot trial that tested a wearable sensor/device (Fitbit One) for self-monitoring and SMS text-messaging prompts to promote PA in overweight/obese adults. In a 2-group design, 67 participants were provided the Fitbit One and half were randomized to receive 3 daily SMS-based PA prompts. A Fitbit One was provided to facilitate self-monitoring with a wearable tracker for instant feedback and website of daily PA summaries. Outcome measures were number of steps and minutes of PA by intensity-level using two accelerometers: Actigraph GT3X+ (primary) at baseline and 6-week follow-up and Fitbit One (secondary) at baseline and weeks 1-6. The main hypothesis was that text messaging plus the Fitbit One would show a greater increase in steps and minutes of PA compared to only the Fitbit One at 6-week follow-up.

Official Title
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Wearable Sensor/Device With Website (Fitbit One) and SMS Text Messaging Prompts to Increase Physical Activity in Overweight/Obese Adults: A Randomized Controlled Pilot Trial

Conditions
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Health Behavior, Obesity

Intervention / Treatment
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* Behavioral: SMS Text Messages & Fitbit One
* Behavioral: Fitbit One Only


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 18-69 years of age overweight or obese (otherwise healthy) does not meet recommended levels of PA (>150 min/wk of MVPA) owns a personal mobile phone and able to use SMS text-messaging owns a personal computer, has access to Internet, able to operate the Fitbit One fluent in English

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 69 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: SMS Text Messages & Fitbit One<br>All study participants were provided a Fitbit One to facilitate self-monitoring of PA. Those who were randomly assigned to the intervention group were asked to indicate 3 preferred times of the day to receive text message prompts to do PA throughout the 6-week study period. | Behavioral: SMS Text Messages & Fitbit One<br>* The primary aim was to test text-messaging in its basic form to prompt physical activity. A secondary aim was to examine the effects of the Fitbit One.<br>* Other names: very active minutes;|
| Active Comparator: Fitbit One Only<br>An active control group was also provided the Fitbit One to facilitate self-monitoring of PA throughout the 6-week study period. | Behavioral: Fitbit One Only<br>* Active controls received a Fitbit One to facilitate self-monitoring (and no text messages)<br>* Other names: very active minutes;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| steps per day (Actigraph GT3X+) | Number of steps per day was measured using Actigraph GT3X+ at baseline and 6-week follow-up | up to 6 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Minutes per week of physical activity by intensity level (Actigraph GT3X+) | Moderate-to-vigorous intensity physical activity (MVPA) (min/wk) and total PA (min/wk) were assessed using Actigraph GT3X+ at baseline week and 6-week follow-up | up to 6 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Fitbit One, wearable sensor, wearable device, web-based intervention, SMS text messages, randomized controlled trial, physical activity, behavioral intervention, text message prompts, text messaging, technology, exercise