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

Not Applicable

Completed

• Conditions: Obesity; Health Behavior
• Interventions: Behavioral: SMS Text Messages & Fitbit One; Behavioral: Fitbit One Only

• Registration Number: NCT02188875
• Lead Sponsor: University of California, San Diego

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.

Detailed Description

Not available

Study Timeline

• Study Start: 2013-01
• Primary Completion: 2014-01
• Study Completion: 2014-01
• Study First Submitted: 2014-07-10
• Study First Submitted QC: 2014-07-11
• Study First Posted: 2014-07-14
• Status Verified: 2019-10
• Last Update Submitted: 2019-10-02
• Last Update Posted: 2019-10-04

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 67

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

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
SMS Text Messages & Fitbit One	SMS Text Messages & Fitbit One	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.
Fitbit One Only	Fitbit One Only	An active control group was also provided the Fitbit One to facilitate self-monitoring of PA throughout the 6-week study period.

Primary Outcome Measures

Name	Time	Method
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 Outcome Measures

Name	Time	Method
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

Trial Locations

Locations (1)

UCSD Moores Cancer Center; 🇺🇸 La Jolla, California, United States