Exercise use vs. exercise abuse: Comparing the motivation and body image of "healthy" and "unhealthy" exercisers.

Abstract

The purpose of this thesis was to examine the influence of exercise motivation and body image on exercise behavior (using a multi-method approach), in order to better understand the phenomenon of unhealthy exercise. The first phase of this study was quantitative, and served to compare the exercise motivation (using Self-Determination Theory, Deci & Ryan, 1985) and perception of body image of "healthy" and "unhealthy" exercisers using a questionnaire. Specifically, 233 exercisers (102 males, 131 females) completed a questionnaire compiled of a self-reported exercise behavior scale (Salonen & Lakka, 1987), the Commitment to Exercise Scale (Davis et al., 1993), the Sport Motivation Scale (Pelletier et al., 1995), and the Body Cathexis Scale (Tucker, 1981). The self-reported exercise behavior scale and the Commitment to Exercise Scale were used to divide exercisers into "healthy" and "unhealthy" groups. In order to obtain a deeper, more complex, understanding of the phenomenon of unhealthy exercise specifically, a second qualitative phase (Phase 2) consisted of interviewing 4 exercisers (2 males, 2 females) identified in Phase 1 as having the most "unhealthy" exercise behaviors. (Abstract shortened by UMI.)