This book provides potential entrepreneurs with a comprehensive insight into the topic of starting a business in the field of personal training. The insight highlights problem areas but primarily serves as a thorough guide for those aiming to establish a full-time career in personal training. The reader gains an understanding of the variety of conceptual possibilities and is shown the target audience potential underlying this activity. Additionally, the author extensively addresses the central legal aspects that a personal trainer must consider when becoming self-employed. This includes, for example, choosing the appropriate legal form, tax law, and issues related to insurance and retirement planning. Finally, market entry strategies and marketing strategies are discussed, which are essential for successful business operations.