The theoretical knowledge in fitness skills is the most basic and important course, which contains many contents. Theoretical knowledge and the principle of reasonable diet and adequate rest, we should understand the characteristics of sports nutrition and energy substances and the order of using energy during exercise. Knowing how to replenish energy in exercise and understand the nutritional composition and application of food, fitness is the process of knowing, understanding and mastering the basic laws of human movement.

If you want to train more scientifically, you must master comprehensive fitness theory knowledge. In the process of learning and training, we should understand anatomy, anatomical analysis and application of human skeleton connection and skeletal muscle, and understand sports movements. Get a preliminary understanding of sports physiology, sports skills (aerobic and anaerobic working ability), factors and training methods determined by various physical qualities (strength, speed, endurance, agility and flexibility), and the principles and coping styles of sports injuries.