Web-based Physical Activity Program

Study Overview
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Brief Summary
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The specific aims of the proposed study are: 1. To determine if web-based Motivational Interviewing (MI) is effective, compared to an informational web-based comparison group, in enhancing physical activity (PA) participation; and 2. To assess the mechanisms by which web-based MI enhances PA through changes in targeted cognitive mediators. The specific hypotheses of the study include that: Hypothesis 1: Web-based MI will increase PA; Hypothesis 2: Web-based MI will lead to stage progression in the direction of increased readiness to participate in PA; Hypothesis 3: Web-based MI will influence theoretically identified cognitive variables; Hypothesis 4: Cognitive variables will mediate increases in PA participation.

Detailed Description
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Increasing physical activity (PA) is a public health priority. There is preliminary support for application of Motivational Interviewing (MI) for physical activity (PA), web-applications for PA promotion, web-based MI for behavior change, and finally web-based MI for PA. Based on collective findings in these areas of inquiry, it is necessary to investigate the efficacy of MI as a method that lends readily to practical applications for PA promotion. The current study seeks to investigate whether web-based MI can be applied in an adult population to enhance PA participation using a physician referral scheme. Additionally, mechanisms of behavior change are considered in order to inform future research and intervention.

Official Title
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Investigation of Web-based Motivational Interviewing to Increase Physical Activity Participation Among Adults

Conditions
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Physical Activity

Intervention / Treatment
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* Behavioral: Web-based Motivational Interviewing


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adults referred through primary care due to insufficient physical activity standards based on Centers for Disease Control (CDC) guidelines for aerobic activity. Must have internet access and e-mail. Cleared by physician for physical activity participation. Exclusion Criteria: Greater than 10,000 steps per day on average based on baseline pedometer screening over the course of 7 days.

Ages Eligible for Study
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Minimum Age: 21 Years
Maximum Age: 55 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

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: Web-based, Mi=Based Intervention<br>4 session web-based, MI-based intervention. | Behavioral: Web-based Motivational Interviewing<br>* Participants will engage in 4 sessions of web-based motivational interviewing over the course of 4 weeks.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Physical Activity (pedometer recordings) | Physical activity will be assessed using pedometers. | 1 week post-intervention | 
| Physical activity (self-report) | Physical activity will be assessed using a self-report inventory. | 3-months post-intervention | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cognitive Mediators | Cognitive mediators of physical activity participation including self-efficacy, readiness to change, motivation, intention, enjoyment, and decisional balance for physical activity will be assessed. | 3 months post intervention | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Physical Activity, Motivational Interviewing, Web-based, Physician Referral