Adherence to physical activity has received a great deal of attention in research literature due to the positive effects it has on many health problems and mood. Despite these benefits, adherence in physical activity programs is beset by high attrition rates. The present study focused on a tae kwon do sample in which attrition at the beginning level is high. The purpose of this study was to assess a relationship between selected variables and adherence of the beginning students. Forty-three subjects (27 male: 16 female) participated in the study. The average age was approximately 21, with a range from 18 to 47. The sample was collected from three university sites which were part of the American Moo Duk Kwan Society, a university based, tae kwon do club. Participants voluntarily completed a questionnaire packet that included the following: a demographics form, an assessment of level and strength of self-efficacy, an assessment of intrinsic and extrinsic motivations, and a measure of time, effort, and obstacle barriers. Significant correlations were found between level of self-efficacy and both dependent variables (hours of attendance and participation in the promotional belt test). In addition, strength of self-efficacy was correlated with participation at the promotional belt test; and the time barrier measure was correlated with hours of attendance. These findings suggest that self-efficacy plays a significant part in adherence of participants in tae kwon do. Further research should be conducted to assess the possible causal relationship of these variables.