Skip to main content
OpenTrials
Completed

NCT Number: NCT04651751

Exercise Habit & MPAC

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.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Public Health

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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)

Treatment and study plan

Facilitating an Exercise Habit and Identity via the Multi-Process Action Control Model- A Randomized-Controlled Trial

Behavioral

Participants attended a workshop which consisted of a presentation and an exercise planning exercise.

Primary outcomes

  1. GT3X+ Actigraph Activity Monitors (for measuring physical activity)

    Time frame: Baseline to 8 weeks

    Participants wear accelerometers for one week at baseline and at week eight to record their physical activity.

Secondary outcomes

  1. 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 outcomes

  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".

Sponsors and collaborators

Lead sponsor

University of Victoria

Other

Registry information

Official study title

Facilitating an Exercise Habit and Identity Via the Multi-Process Action Control Model- A Randomized-Controlled Trial

Important dates

Study start
2015
Primary completion
2015
Study completion
2015
First posted
Dec 3, 2020
Registry last updated
Dec 3, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.