Exercise Habit and M-PAC
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|ClinicalTrials.gov Identifier: NCT02785107|
Recruitment Status : Completed
First Posted : May 27, 2016
Last Update Posted : June 1, 2016
|Condition or disease||Intervention/treatment||Phase|
|Public Health||Behavioral: M-PAC Group||Phase 2 Phase 3|
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.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||94 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||None (Open Label)|
|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|
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.
- 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.
- 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''.
- 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".
- 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".
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 ClinicalTrials.gov identifier (NCT number): NCT02785107
|Canada, British Columbia|
|University of Victoria|
|Victoria, British Columbia, Canada, V8W 2Y2|
|Principal Investigator:||Navin Kaushal, PhD||University of Victoria|