We can understand our body as a precise instrument. When we do sports, it's like changing musical instruments into various shapes. However, when changing, we must follow the most basic structure of the instrument. If we don't make some unbearable changes to the body according to the most basic structure of the body, how can our body not be injured? You're out of range. So the basic structure must be understood, so that you can understand the rotation principle of joints and better apply it to the daily life of fitness.
In fact, the fitness instructor is a compound occupation, and the fitness instructor should ensure the safety of the exercisers when sparring. As a fitness instructor, he must know anatomy. When the human body is exercising, it will have various influences on all aspects of the body. A fitness instructor with anatomical knowledge can help people master fitness knowledge, improve their technical level, prevent sports diseases, and reserve knowledge and cultivate their abilities in future fitness teaching. If a fitness instructor doesn't know anatomy, he is not a qualified fitness instructor, and few people will hire him unless he runs his own gym.
Finally, I want to say that although a fitness instructor should know anatomy knowledge, it is not necessary to study it like an anatomist. You only need to know the basic knowledge, such as the structure of the human body, the influence of the human body during exercise, and the matters needing attention during fitness.