Exercise Habit and M-PAC

NCT ID: NCT02785107

Last Updated: 2016-06-01

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE2/PHASE3
• Total Enrollment: 94 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2015-01-31
• Study Completion Date: 2015-05-31

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.

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.

Conditions

Public Health

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: NONE

Study Groups

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.

Group Type: EXPERIMENTAL

M-PAC Group

Intervention Type: BEHAVIORAL

Participants attended a workshop, completed a worksheet and received a booster phone call follow-up at week four.

Control

Participants exercised on their own without receiving any instructions.

Group Type: NO_INTERVENTION

No interventions assigned to this group

Interventions

M-PAC Group

Participants attended a workshop, completed a worksheet and received a booster phone call follow-up at week four.

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

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

Exclusion Criteria

• age <18 or 65+
• Par-Q fail

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Victoria

OTHER

Sponsor Role: lead

Responsible Party

Navin Kaushal

PhD

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Navin Kaushal, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Victoria

Locations

University of Victoria

Victoria, British Columbia, Canada

Countries

Canada

References

Kaushal N, Rhodes RE, Spence JC, Meldrum JT. Increasing Physical Activity Through Principles of Habit Formation in New Gym Members: a Randomized Controlled Trial. Ann Behav Med. 2017 Aug;51(4):578-586. doi: 10.1007/s12160-017-9881-5.

Reference Type: DERIVED

PMID: 28188586 (View on PubMed)

Other Identifiers

14-306

Identifier Type: -

Identifier Source: org_study_id