CalFitness Smartphone-Delivered Physical Activity Intervention With Messaging

Not Applicable

Completed

• Conditions: Physical Activity; Sedentary Lifestyle
• Interventions: Behavioral: Step Goal Delivery by Smartphone; Behavioral: Message Delivery by Smartphone

• Registration Number: NCT03148145
• Lead Sponsor: University of California, Berkeley

Brief Summary

The overall goal of this study is to test personalized mobile phone-based physical activity interventions among students at the University of California, Berkeley. Most physical fitness applications for smartphones and activity trackers use a constant goal for the number of steps each day. However, if the step goals are dynamically adjusted according to past behavior, then the corresponding goals may encourage individuals to increase their physical activity level. This study consists of a randomized controlled trial in which we are assessing the efficacy of four different algorithms for calculating personalized goals for the number of steps each day and for determining which motivational messages to send each day.

Detailed Description

Not available

Study Timeline

• Study Start: 2017-02-01
• Study First Submitted: 2017-05-08
• Study First Submitted QC: 2017-05-08
• Study First Posted: 2017-05-10
• Primary Completion: 2017-05-31
• Study Completion: 2017-05-31
• Status Verified: 2018-10
• Last Update Submitted: 2018-10-09
• Last Update Posted: 2018-10-10

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 40

Inclusion Criteria

• intent to become physically active
• own an iPhone 5s (or newer model)
• willing to keep the iPhone in pockets during the day
• willing to install and use the intervention app every day for 4 months
• ability to speak and read English.

Exclusion Criteria

• known medical conditions or physical problems that require special attention in an exercise program
• planning an international trip during the next 4 months, which could interfere with daily server uploads of mobile phone data
• pregnant/gave birth during the past 6 months
• severe hearing or speech problem
• history of an eating disorder
• current substance abuse
• current participation in lifestyle modification programs or research studies that may confound study results
• history of bariatric surgery or plans for bariatric surgery in the next 12 months.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Averaged Steps Goals and Random Messages	Message Delivery by Smartphone	Step Goal Delivery by Smartphone Message Delivery by Smartphone
Averaged Steps Goals and Random Messages	Step Goal Delivery by Smartphone	Step Goal Delivery by Smartphone Message Delivery by Smartphone
Algorithm Steps Goal and Random Messages	Step Goal Delivery by Smartphone	Step Goal Delivery by Smartphone Message Delivery by Smartphone
Algorithm Steps Goal and Random Messages	Message Delivery by Smartphone	Step Goal Delivery by Smartphone Message Delivery by Smartphone
Algorithm Steps Goal and Messages	Message Delivery by Smartphone	Step Goal Delivery by Smartphone Message Delivery by Smartphone
Constant Steps Goal	Step Goal Delivery by Smartphone	Step Goal Delivery by Smartphone
Algorithm Steps Goal and Messages	Step Goal Delivery by Smartphone	Step Goal Delivery by Smartphone Message Delivery by Smartphone

Primary Outcome Measures

Name	Time	Method
Daily Steps Taken Per Day	10 weeks

Trial Locations

Locations (1)

University of California, Berkeley; 🇺🇸 Berkeley, California, United States