Purpose: The purpose of this study was to evaluate the influence of 7-day exercise deprivation on physical self-concept of habitual exercisers. Methods: Seven habitual exercisers who regularly exercised 6 to 7 days per week and 7 non-habitual exercisers completed a) Stage of Change Scale for Exercise, b) DSM-V Questionnaire, c) Korean Exercise Addiction Scale, and d) Korean version of the Physical Self-Description Questionnaire. Participants refrained from their regular physical activity for the next 7 days. The Korean version of the PSDQ were completed at the same time of each deprivation day and in-depth interviews were conducted on the last day. Results: The results indicated that habitual exercisers were significantly higher on the measures of physical self-concept compared to non-habitual participants. For habitual exercisers, perceptions of sports confidence, body fat, physical activity, flexibility, endurance, muscular strength, and physical self-worth decreased sharply and steadily as exercise deprivation continued. The results from interviews revealed that the habitual exercisers had negative reactions to the exercise deprivation and mentioned considerable displeasures about their decreased physical self-concept. Conclusion: The pattern of physical self-concept disturbance followed by unpleasant feelings with exercise deprivation might contribute to understanding why and how individuals became dependent on exercise.