Mediators and Moderators of Exercise Behavior Change (COSTRIDE)
Rates of cancer and cardiovascular disease have shown very little improvement over the past two decades, and the incidence of Type II diabetes mellitus is increasing at an alarming rate. Recent reports estimate that approximately 30% of total cancer deaths are related to poor exercise and nutrition, and other reports have suggested that, when taking into consideration both cardiovascular disease and cancer, inactivity contributes to as many as 250,000 premature deaths per year (Booth et al., 2002). Despite the benefit of regular physical activity in the prevention of cancer and other debilitating illnesses, 75% of the U.S. population do not get the recommended amount of physical activity as defined by 30 minutes of moderate intensity physical activity 5 or more days per week (CDC, 2001), and 40% of the population is completely sedentary (USDHHS, 19960. The objective of the proposed research is to understand the mediators and moderators of a well-tested individually tailored, print-based intervention to increase exercise behavior among sedentary adults. Using a randomized, controlled intervention ton trial, the proposed study will address three primary and one secondary hypotheses: 1) A previously tested and validated exercise promotion intervention (c.f., Marcus et al., 1998) is successful at helping sedentary individuals initiate and maintain a moderate intensity physical activity regimen, as compared to a health and wellness control intervention, 2) Increases in positive attitudes, perceived normative support, self-efficacy, and intentions to exercise will mediate the effectiveness of the intervention, 3) That increased positive mood, and better temperature, stress, and lactate regulation immediately after exercise challenge (assessed in the laboratory) will moderate the effectiveness of the intervention, and 4) Secondarily, we will test whether gender, race/ethnicity, and two recently suggested genetic factors (BDNF and OPRM1) moderate the effectiveness of the intervention. The rigorous assessment of how and for whom an exercise promotion intervention is effective will provide information for future development of intervention strategies and content, as well as allow the targeting of exercise content to individuals for whom it is most likely to be effective.
Validate STRIDE Exercise Intervention in Sedentary Individuals.
Increase Positive Attitudes, Perceived Normative Support, Self-efficacy, and Intentions.
Increase Self-reported Physical Activity.
|Study Design:||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Factorial Assignment
Masking: Single Blind (Investigator)
|Official Title:||Mediators and Moderators of Exercise Behavior Change|
- Self-reported physical activity [ Time Frame: 3,6,9,and 12 months post baseline ] [ Designated as safety issue: No ]After being randomly assigned to the exercise or health-and-wellness conditions, participants were followed up every three months for one year at which times they reported their current physical activity.
|Study Start Date:||September 2004|
|Study Completion Date:||August 2009|
|Primary Completion Date:||August 2009 (Final data collection date for primary outcome measure)|
|Experimental: Exercise intervention (STRIDE)||Behavioral: STRIDE|
|Active Comparator: Health and Wellness Control||Behavioral: STRIDE|
|United States, New Mexico|
|University of New Mexico|
|Albuquerque, New Mexico, United States, 87131|