Clinical trial NCT02250950: An Examination of the Efficacy of a Self-Determination Theory and Motivational Interviewing Exercise Intervention
Official title: Decreasing Disparities in Physical Activity: An Intervention Based on Self-Determination Theory and Motivational Interviewing
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE2
PHASE3
Conditions: Exercise Promotion
Keywords: self-determination theory
motivational interviewing
exercise
physical activity
Lead sponsor: Syracuse University
Sponsor class: OTHER
First posted: 2014-09-26
Enrollment: 57
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: 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.

Detailed description: 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.

Eligibility criteria: 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.

Exclusion Criteria:

* not have any illnesses that would prevent them from exercising once a week, not be pregnant or planning to get pregnant within the next 3 months

Primary outcomes:
measure: International Physical Activity Questionnaire
timeFrame: 12 weeks
Secondary outcomes:
measure: Psychological General Well-Being Index
timeFrame: 12 weeks
measure: Basic Psychological Needs in Exercise Scale
timeFrame: 12 weeks
measure: Behavioural Regulation in Exercise Questionnaire
timeFrame: 12 weeks
measure: Physical Activity Adherence
timeFrame: 12 weeks
Other outcomes:
Locations:
city: Guilderland
country: United States
facility: Lauren S. Miller
state: New York
Study officials:
affiliation: Syracuse University
name: Lauren S Miller, M.S.
role: PRINCIPAL_INVESTIGATOR
References:
citation: Miller LS, Gramzow RH. A self-determination theory and motivational interviewing intervention to decrease racial/ethnic disparities in physical activity: rationale and design. BMC Public Health. 2016 Aug 11;16(1):768. doi: 10.1186/s12889-016-3413-2.