Understanding Mechanisms of Exercise Behavior Change
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Enrollment
- 68
- Locations
- 1
- Primary Endpoint
- Moderate-vigorous physical activity minutes
Study Overview
Brief Summary
This research seeks to examine psychological factors that may impact relationship between incentives and health behavior engagement, specifically physical activity. Additionally, it will compare the impact of two different incentive schedules on behavior engagement, one providing immediate rewards (i.e. rewards received on a daily basis) and another providing delayed rewards (i.e. rewards received at the end of the study period), with an active self-monitoring intervention condition in which no rewards are offered. Study participants will provide reports of their physical activity each day for three weeks, and in the two incentive conditions, they will receive small monetary rewards for their physical activity. Following the three week reporting and reward period, participants will complete two additional assessments, measuring psychological constructs and behavior engagement following the cessation of rewards. The study will also examine how cognitive and anthropomorphic factors may contribute to intervention response and the effects on psychological constructs.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Basic Science
- Masking
- Single (Participant)
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •Complete less than 150 minutes of moderate-vigorous physical activity weekly
- •Daily access to the internet for 3 weeks following baseline research visit
- •Have or are willing to create an account on PayPal
- •Willing to wear a heart rate monitor watch during physical activity for 3 weeks
- •BMI greater than or equal to 25, from self-reported height and weight
Exclusion Criteria
- •Diagnosis of cardiovascular, metabolic, or renal disease
Arms & Interventions
Self-Monitoring
Participants self-monitor their physical activity
Intervention: self-monitoring (Behavioral)
Daily Incentives
daily payments for physical activity
Intervention: self-monitoring (Behavioral)
Daily Incentives
daily payments for physical activity
Intervention: daily incentives (Behavioral)
Delayed Lump Sum Incentives
lump sum payments for physical activity
Intervention: self-monitoring (Behavioral)
Delayed Lump Sum Incentives
lump sum payments for physical activity
Intervention: delayed lump sum incentives (Behavioral)
Outcomes
Primary Outcomes
Moderate-vigorous physical activity minutes
Time Frame: Week 5
summed minutes of weekly moderate intensity physical activity \& vigorous intensity physical activity
Self-Efficacy for physical activity
Time Frame: Week 5
8-item self-report scale measuring self-efficacy (Social Cognitive Theory, Bandura, 1977; also called "perceived behavioral control", Theory of Planned Behavior, Ajzen, 1985); scores are a mean of 8 items, scored 1-7 with higher scores indicative of greater self-efficacy
Attitudes toward physical activity
Time Frame: Week 5
12-item self-report scale (Theory of Planned Behavior, Ajzen, 1985); scores are a mean of 12 items scored from -5 to +5, with higher scores indicative of more positive attitudes
Moderate-vigorous physical activity minutes
Time Frame: Week 3
summed minutes of weekly moderate intensity physical activity \& vigorous intensity physical activity
Self-Efficacy for physical activity
Time Frame: Week 3
8-item self-report scale measuring self-efficacy (Social Cognitive Theory, Bandura, 1977; also called "perceived behavioral control", Theory of Planned Behavior, Ajzen, 1985); scores are a mean of 8 items, scored 1-7 with higher scores indicative of greater self-efficacy
Attitudes toward physical activity
Time Frame: Week 3
12-item self-report scale (Theory of Planned Behavior, Ajzen, 1985); scores are a mean of 12 items scored from -5 to +5, with higher scores indicative of more positive attitudes
Secondary Outcomes
No secondary outcomes reported
Investigators
Angela Bryan
Professor
University of Colorado, Boulder