Foot extension: the thumb drives the toes to press down as hard as possible, and the instep is stretched straight. Nervous. It means stretching the foot, and it is best to let the foot surface protrude to increase the aesthetic feeling of the foot shape and the expressive force of the foot. At the same time, foot stretching can increase the strength and flexibility of ankle joint. For example, when jumping, your feet should be stretched straight and sharp when you leave the ground, so that the lines of the whole leg look beautiful and smooth. Tension: It is also one of the basic elements of ballet. In the basic training class, stretching your feet is one of the topics that teachers often remind students. It can be said that as long as the strength leg moves, especially off the ground, it must be stretched. There are two important functions of foot extension. First, the extension of the foot undoubtedly prolongs the length of the leg and strengthens the streamline elegance of the leg. Second, foot extension training can make the ankle joint get strong exercise and enhance the sensitivity from ankle joint to toe joint. In general beginners' foot extension exercises, it often happens that the instep does not extend the toes or only the toes do not extend the instep, which does not meet the requirements of the specification. Extending the foot must start from the ankle joint, penetrate the strength to the toes, and let the toes find the center of the foot. In fact, the tighter the toes on the instep, the tighter the legs and knees will be.