A number of studies have placed at the forefront variables that predict the loyalty of clients in fitness centres. In fact, no study has analysed the differences between these variables according to business models. The objective of this study was to analyse the relationship between quality, value, satisfaction and the future intentions of clients of public and private low-cost fitness centres and their differences. A questionnaire was administered to a sample of 1805 fitness centre clients. A confirmatory factor analysis and multi-group analysis was performed to test the difference between two invariance models. The findings indicate a greater weight in facilities and employees of the quality perceived from private low-cost fitness centres and a greater weight in programmes from public fitness centres. Furthermore, the relationship between the variables’ overall quality, perceived value, satisfaction and future intentions had a greater influence in private low-cost fitness centres than in public centres.