An Examination of the Efficacy of a Self-Determination Theory and Motivational Interviewing Exercise Intervention

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE2/PHASE3

Total Enrollment

57 participants

Study Classification

INTERVENTIONAL

Study Start Date

2014-06-30

Study Completion Date

2015-02-28

Brief Summary

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The current study involves conducting an intervention based on self-determination theory (SDT) and motivational interviewing (MI) to promote physical activity in a racially-diverse sample. It is expected that this intervention will successfully increase physical activity in participants.

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Detailed Description

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The mental and physical benefits of physical activity are well-established. However, there is a racial disparity in exercise, such that minorities are much less likely to engage in physical activity than are white individuals. Research suggests that a lack of motivation may be an important barrier to physical activity for racial minorities. Therefore, interventions which increase participants' motivation may be especially useful in promoting physical activity within these groups. A previous meta-analysis has found that physical activity interventions based on self-determination theory (SDT) and motivational interviewing (MI) are especially effective in increasing white individuals' physical activity (Miller \& Gramzow, under review). However, it remains unclear the extent to which these results apply to minority populations. The current study involves conducting an intervention based on SDT and MI to promote physical activity in a racially-diverse sample. It is expected that this intervention will successfully increase physical activity in participants. Specifically, it is expected that there will be a greater relative increase in physical activity in minority individuals than white individuals within the intervention group because it is expected that their level of activity will be lower at baseline.

Conditions

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Exercise Promotion

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

DOUBLE

Participants Investigators

Study Groups

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MI and SDT Exercise Group

Intervention Condition: Participated in 12 weekly meetings led by MI- and SDT-trained exercise instructor.

Group Type EXPERIMENTAL

MI and SDT Exercise Group

Intervention Type BEHAVIORAL

The intervention group will participate in a group exercise class that will be held once a week for an hour. This class will be taught by an instructor trained in MI and SDT. This individual will lead group discussions and will have the participants exercise together.

Non-MI and SDT Exercise Group

Control Condition: Participated in 12 weekly meetings led by an exercise instructor who was not trained in MI and SDT.

Group Type SHAM_COMPARATOR

Non-MI and SDT Exercise Group

Intervention Type BEHAVIORAL

This group will participate in a group exercise class that will be held once a week for an hour. This class will be taught by an instructor who was not trained in MI and SDT. This individual will lead a regular exercise class.

Interventions

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MI and SDT Exercise Group

The intervention group will participate in a group exercise class that will be held once a week for an hour. This class will be taught by an instructor trained in MI and SDT. This individual will lead group discussions and will have the participants exercise together.

Intervention Type BEHAVIORAL

Non-MI and SDT Exercise Group

This group will participate in a group exercise class that will be held once a week for an hour. This class will be taught by an instructor who was not trained in MI and SDT. This individual will lead a regular exercise class.

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* participants were were willing to attend an exercise class once a week for 12 weeks, were willing to complete questionnaires at baseline and 12 weeks, allowed the intervention staff to monitor their attendance at the YMCA for 6 months post intervention, and allowed the exercise instructor to create an audio recording of all of the intervention sessions.