The aim is to evaluate the factors affecting the success of fitness businesses from the perspective of facility managers. In the study that the qualitative research method was used, data were collected by interview technique. Criterion sampling, one of the purposeful sampling methods, was preferred in determining the study group. The sample group of the study consisted of people who have had at least five years of experience in the fitness industry and are in managerial positions. Face-to-face interviews were held with 26 volunteer managers with these characteristics, and a semi-structured interview form, prepared by the researcher, was used. The data obtained was analyzed by content analysis. According to the answers of participants, the factors affecting the success of fitness businesses are grouped into four categories, in order of importance: “facility”, “program”, “customer services” and “marketing. In the facility category, cost, price, location, cleanliness, commitment, equipment, and size; in the program category, service range and group exercises; in the customer services category, qualified employee, and communication; in the program category, recommendations, social networks, and special discounts codes come into prominence. As a result, there are implications for fitness businesses that want to stay ahead of their competitors and succeed in encouraging exercise habits and getting more people involved in physical activity.