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Exercise Habit and M-PAC

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02785107
Recruitment Status : Completed
First Posted : May 27, 2016
Last Update Posted : June 1, 2016
Information provided by (Responsible Party):
Navin Kaushal, University of Victoria

Brief Summary:
The promotion of physical activity (PA) is paramount to public health, yet interventions in the social cognitive tradition have yielded negligible improvements. Two reasons for these results may be the over reliance on intention as the proximal determinant of behaviour and a lack of consideration of implicit/automatic determinants of PA. The purpose of this study was to apply Multi-Process Action Control (M-PAC), a framework centered on PA intention-translation and the gradual building of habit to examine PA change using a two-arm parallel design, randomized controlled trial.

Condition or disease Intervention/treatment Phase
Public Health Behavioral: M-PAC Group Phase 2 Phase 3

Detailed Description:

Background: Two of the most prominent limitations of traditional social cognitive models used to understand moderate-to-vigorous physical activity (MVPA) are the gap between intention and behaviour and the lack of consideration of implicit processes in behavioural enactment. Thus, new models are now being examined that attempt to consider these potential limitations. Multi-Process Action Control (M-PAC) is one such attempt to build a more comprehensive schematic, whereby intention is established via the means of constructs from traditional social cognitive theories (i.e., outcome expectations, perceived capability), but the success of translating this intention to behaviour depends on behavioural-regulation (self-regulatory tactics) (BR), affective judgments (expected pleasure) (AJ) and opportunity (time, access). Over time, M-PAC proposes that habit (stimulus -behaviour bonds) and identity (role-behaviour bonds) develop from performing the behaviour and largely contribute to the maintenance of PA.

Aim: The purpose of this study was to conduct at two-arm parallel design, RCT to determine if the M-PAC experimental group would demonstrate greater change in PA and post-intention constructs across time.

Methods: Participants (n=94) were inactive new gym members and were randomized into a control or M-PAC experimental group. The experimental 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 at week eight.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 94 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Facilitating an Exercise Habit Via the Multi-Process Action Control Model: A Randomized-Controlled Trial
Study Start Date : January 2015
Actual Primary Completion Date : May 2015
Actual Study Completion Date : May 2015

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Intervention
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.
Behavioral: M-PAC Group
Participants attended a workshop, completed a worksheet and received a booster phone call follow-up at week four.

No Intervention: Control
Participants exercised on their own without receiving any instructions.

Primary Outcome Measures :
  1. GT3X+ Actigraph Activity Monitors (for measuring physical activity) [ Time Frame: Baseline to week eight ]
    Participants wear accelerometers for one week at baseline and at week eight to record their physical activity.

Secondary Outcome Measures :
  1. Self-Report Behavioural Automaticity Index (self report, survey question) [ Time Frame: 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''.

Other Outcome Measures:
  1. Environmental Cues (self report, survey question) [ Time Frame: Baseline, week four, week eight ]
    The following item was used to assess if participants implemented the use of cues: "I use cues at home to remind me to exercise (e.g. placing a water bottle on my desk or gym clothes on the bed). The item was rated on a five point Likert scale which ranged from "1=strongly disagree" to "5= strongly agree".

  2. Temporal Consistency (self report, survey question) [ Time Frame: Baseline, week four, week eight ]
    The item was worded "How consistently do you exercise at the same time each day? (e.g., exercising every morning at 7 am, or exercising daily after supper)". The question was asked on a five point Likert scale which range from "1=not consistent at all" to "5=very consistent".

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • New gym member
  • age 18-65
  • Par-Q pass

Exclusion Criteria:

  • age <18 or 65+
  • Par-Q fail

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02785107

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Canada, British Columbia
University of Victoria
Victoria, British Columbia, Canada, V8W 2Y2
Sponsors and Collaborators
University of Victoria
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Principal Investigator: Navin Kaushal, PhD University of Victoria

Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Navin Kaushal, PhD, University of Victoria Identifier: NCT02785107    
Other Study ID Numbers: 14-306
First Posted: May 27, 2016    Key Record Dates
Last Update Posted: June 1, 2016
Last Verified: May 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Keywords provided by Navin Kaushal, University of Victoria:
Physical Activity