Health Behavior, Obesity
Conditions
Keywords
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
Brief summary
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.
Interventions
BEHAVIORALSMS Text Messages & Fitbit One
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.
BEHAVIORALFitbit One Only
Active controls received a Fitbit One to facilitate self-monitoring (and no text messages)
Sponsors
Carol Vassiliadis Family
University of California, San Diego
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
SINGLE (Investigator)
Eligibility
Sex/Gender
ALL
Age
18 Years to 69 Years
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| steps per day (Actigraph GT3X+) | up to 6 weeks | Number of steps per day was measured using Actigraph GT3X+ at baseline and 6-week follow-up |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Minutes per week of physical activity by intensity level (Actigraph GT3X+) | up to 6 weeks | 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 |
Other
| Measure | Time frame | Description |
|---|---|---|
| Physical activity levels (Fitbit One) | up to 6 weeks | Physical activity by intensity level (i.e., fairly and very active minutes and total active minutes) were assessed using the Fitbit One throughout the entire duration of the study |
| Steps per a day (Fitbit One) | up to 6 weeks | Steps per day were assessed using the Fitbit One throughout the entire duration of the study |
Countries
United States
Outcome results
None listed