Keeping your members, also known as member retention, or simply retention, has been a central theme in the fitness industry for a long time. 'Keeping customers' sounds so easy. In practice, it turns out to be far from that. Retention has been high on the agenda for years, but so far not many miracles have occurred in this area. The customers continue to switch channels and it is still hard to keep them on track. For fitness clubs, it sometimes seems like beating a dead horse. On the 138 pages of this hard cover and full colour book, retention of members in fitnessclubs is discussed from a research, management and practical perspective. The book reviews many studies. Most of the content is dedicated to practical tools, which can be used by managers of fitnessclubs. This publication is devided in three parts. The first part analyzes member retention from two perspectives: the customer and the business perspective. In part two of the book, member retention is discussed per stage of the membership. For example, marketing and sales, the introduction and the cancellation of the membership. In the last section retention is linked to management, for example quality management. The book is re-published in 2013 in English, German and Dutch.