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OpenTrials
Completed

NCT Number: NCT03465800

Understanding Mechanisms of Exercise Behavior Change

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.

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Key information

Conditions

Overweight and Obesity Behavior Body Weight Incentives Motor Activity Nutrition Disorders Nutritional and Metabolic Diseases Obesity Overnutrition Overweight Pathological Conditions, Signs and Symptoms Physical Activity Signs and Symptoms

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

University of Colorado Boulder

Boulder, Colorado, 80309, United States

Who can participate

Healthy volunteers accepted: Yes

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

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

Treatment and study plan

Self-monitoring

Behavioral

self-monitoring of physical activity

daily incentives

Behavioral

daily incentive payments for physical activity

delayed lump sum incentives

Behavioral

delayed lump sum payments for physical activity

Primary outcomes

  1. Moderate-vigorous physical activity minutes

    Time frame: Week 3

    summed minutes of weekly moderate intensity physical activity & vigorous intensity physical activity

  2. 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

  3. Moderate-vigorous physical activity minutes

    Time frame: Week 5

    summed minutes of weekly moderate intensity physical activity & vigorous intensity physical activity

  4. 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

  5. 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

  6. 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

Sponsors and collaborators

Lead sponsor

University of Colorado, Boulder

Other

Registry information

Important dates

Study start
2018
Primary completion
2018
Study completion
2018
First posted
Mar 14, 2018
Registry last updated
Oct 19, 2018

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.

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