摘要:: Although the production of knowledge in the area has risen substantially, there is still a gap concerning the investigation about the relation of the Physical Education professional and the job market. Aiming to widen the understanding of the topic, we have defined the following targets: a) to discuss the professional intervention in a fitness center; and b) to analyze the meaning of such intervention for the professionals. Methodologically, this essay is characterized as a qualitative research and a case study. Physical Education professionals, who work in a large fitness center, have been interviewed. In the course of the transition and the implantation of an Intervention Standardized Program, that, which could be considered as a resistance to the changes, is, in fact, the affirmation made by the individuals of their condition as professionals. The subjects ( professionals) are aware that their intervention is measured by the knowledge acquired in their academic and professional experiences and by the knowledge which restrict this intervention.