America needs a healthy workforce to sustain the country. The scourge of obesity continues to plague Americans despite government initiatives such as the Affordable Care Act and wellness programs in the workplace to combat this epidemic. However, despite initiatives to make America healthy, barriers continued to impede the nation's health. Lack of awareness and sensitivity to what motivates individual participants versus group participants built formidable barriers to accessing all workplace employees equitably. The purpose of this study was twofold. First, the intent of this study was to explore the relationship between self-efficacy and the impact on participation and engagement when faced with perceived barriers in an eight-week walking challenge. Second, the study sought to explore the relationship between efficacy and the impact on participation and engagement in an eight-week walking challenge between those who participated as a member of a team (collective efficacy) and those who participated individually (self-efficacy). A sequential explanatory mixed-methods research design was used to address the research questions, which entailed a quantitative survey followed by qualitative interviews. The population included 495 benefits-eligible employees representing Brandman University's full-time faculty and staff from over 25 campuses throughout California, Washington, and Oregon. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]