Exercise Habit & MPAC

Not Applicable

Completed

• Conditions: Public Health
• Interventions: Behavioral: Facilitating an Exercise Habit and Identity via the Multi-Process Action Control Model- A Randomized-Controlled Trial

• Registration Number: NCT04651751
• Lead Sponsor: University of Victoria

Brief Summary

The limitations of applying social cognitive models to understand physical activity (PA) have led to the emergence of several new PA models within the past decade. The Multi-Process Action Control (M-PAC) is a comprehensive PA model that proposes intention is established from outcome expectations, perceived capability, and opportunity, then the success of translating this to behavior depends on affective judgments and behavioral-regulation. Over time, M-PAC proposes that behavior is can become maintained through the formation of identity and habit. The purpose of this study was to investigate the trajectory of change of these M-PAC constructs across time in a randomized controlled trial. Participants (n=85) were inactive new gym members and were randomized into a control (n=41) or intervention (n=44) group. The intervention group attended a workshop and received a booster phone call follow-up at week four. Measures for both groups included accelerometry and M-PAC at baseline and eight week follow-up.

Detailed Description

Not available

Study Timeline

• Study Start: 2015-01
• Primary Completion: 2015-06
• Study Completion: 2015-06
• Status Verified: 2020-11
• Study First Submitted: 2020-11-17
• Study First Submitted QC: 2020-11-25
• Last Update Submitted: 2020-11-25
• Study First Posted: 2020-12-03
• Last Update Posted: 2020-12-03

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 85

Inclusion Criteria

• adults 18-65
• new gym members
• exercising < 150 minutes/week at a moderate to vigorous level

Exclusion Criteria

• not affiliated with a gym or recreation center
• exercising > 150 minutes/week at a moderate to vigorous level
• clinical health conditions (assessed by the PAR-Q)

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Intervention	Facilitating an Exercise Habit and Identity via the Multi-Process Action Control Model- A Randomized-Controlled Trial	Those who were randomized into the intervention group attended a workshop where the PI delivered a presentation that focused on establishing a preparatory exercise habit by using the M-PAC approach and proposed habit model. Participants were then provided with instructions on completing their exercise plan sheet.

Primary Outcome Measures

Name	Time	Method
GT3X+ Actigraph Activity Monitors (for measuring physical activity)	Baseline to 8 weeks	Participants wear accelerometers for one week at baseline and at week eight to record their physical activity.

Secondary Outcome Measures

Name	Time	Method
1.Self-Report Behavioural Automaticity Index (self report, survey question	Baseline, week four, week eight	The Self-Report Behavioral Automaticity Index (SRBAI) was used to assess preparatory habit. The SRBAI consists of 4 items on a 5-point Likert scale with 1 being strongly disagree to 5 being strongly agree. The question stem stated ''When I prepare to exercise...'' which was then followed by four items on the scale: ''I do it without having to consciously remember'', ''I do it automatically'', ''I do it without thinking'', and ''I start before I realize I am doing it''.