In the last decade, in parallel with the growing interest and development in the health and fitness sector in the world and in our country, the interest in the concept of “coaching”, which is used to guide individuals about exercise for various reasons, has increased. Thus, according to the American College of Sports Medicine, both personal fitness coaching and wellness coaching are among the top ten in fitness trends worldwide. The concepts of fitness and wellness, which form the basis of the service offered in health and fitness facilities, which are of such importance in our country, are used interchangeably or incorrectly in many areas, especially in the private sector. The purpose of this study is to clarify the concepts of wellness and fitness and to reveal their differences in the understanding of coaching for managers and employees in health and fitness centers. In this study, review method was used. In order to reach the related literature, the publications of the leading organizations in the fields of sports, health and exercise between 2013-2019 were viewed. Fitness coaches are people who have the knowledge, training and skills to design safe and effective exercise programs to help people achieve their individual health and fitness goals. Wellness coaches are people who help and encourage people to reach their goals related to a better life, work with individuals or groups, and have a diverse education and background. There is no specific instructiveness in the nature of a wellness trainer, while a fitness trainer is instructiveness. Unlike fitness instructors, wellness instructors are people who do not tell their members exactly what to do, but ask them what they want and why, and collaborate with them on how to achieve their wishes. As a result, although both concepts serve the aims of individuals to maintain a healthy life and remain fit, they differ in terms of their instructional understanding.