Current location - Music Encyclopedia - QQ Music - Introduction to ballet classes
Introduction to ballet classes

Ⅰ What are the basic ballet skills? I

The basic ballet skills are divided into three categories: ground quality training exercises, upper barre exercises, and lower barre exercises.

1. Ground exercises include:

Instep stretching exercises: The secret to the beauty of toes lies in the instep - the area from the ankle to the toes. When the toes are stretched, the instep will bulge into an arch. The beautiful ballet instep will have a stunning arch.

Bend your feet: Sit on the floor with your legs in front of you and your knees straight. (If your calf muscles are too tight, lean back slightly and use your elbows to support your back.) Bend your feet and stretch your toes toward you. It doesn't matter if your toes are straight up and your heels are off the ground.

Bend the ankle: Bend the ankle downward, with the heel close to the ground and the toes straight forward. (Many dance teachers call this posture "Aladdin's foot" because the foot at this time looks like Aladdin. Magic Lamp.) Bend your ankles as much as possible and straighten your feet forward.

Stretch your toes: Straighten your toes downward and become an extension of the curved arc of your feet. Stretch out as far as possible and make the line as long as possible. Stay in this position for a few seconds. If your feet feel cramped, relax.

Ground quality exercises also include: hooking the instep, crossing the legs and pressing the crotch, lying on the back to suck the legs, lying on the side to suck the legs, lying on the side to suck the legs, waist training, lying on the front to kick, press the legs, and kick the legs. , lowering the waist, etc.;

2. Upper-handle exercises: floor wiping exercises, squatting exercises and leg-pressing exercises, which are the main means of shaping the beauty of posture;

3. Lower-handle exercises: hand Position and foot position training, such as wavy arm movements, circular motions with the feet, as well as step and toe training.

One of the most important features of ballet is that the actress taps the ground with her toes when performing, so it is also called toe dancing. His representative works include "Swan Lake", "Fairy", "The Nutcracker", etc. Ballet uses music and dance techniques to perform dramatic plots.

Ballet art was conceived in Italy and born in the French court of Louis XIV in the late seventeenth century. It was perfected in France in the eighteenth century and entered its most prosperous era in Russia by the late nineteenth century. In the long-term historical development process of nearly four hundred years, ballet has had a great influence on countries around the world and has spread widely. It has now become an art form that is being developed by all countries in the world.

It has the following forms:

1. A form of stage dance, that is, European classical dance, commonly known as ballet. This is a traditional European dance art with strict specifications and structural forms, which was formed after centuries of continuous processing, enrichment and development on the basis of folk dances from various parts of Europe. After the 19th century, an important technical feature was that actresses had to wear special pointe shoes to dance with the tips of their toes, so some also called it toe dancing.

2. Dance drama originally refers to the dramatic art that uses European classical dance as the main means of expression, integrating music, pantomime, stage art, and literature to express a story or a plot. It is called classical ballet ( or classical dance drama).

After the emergence of modern dance in the 20th century, it is called modern ballet, which uses modern dance combined with classical dance techniques as the main means of expression to express the content or plot of the story. Gradually, the word ballet is also used to refer to dance dramas that use various other dances as the main means of expression, although they are different from classical ballet or modern ballet in terms of dance style, structural characteristics, and expression techniques.

3. Among the dance works created by modern choreographers, a considerable number have no story content or plot. Choreographers use European classical dance or modern dance, or combine the two, to express a certain kind of dance. Mood, artistic conception, or expression of the author's understanding of a certain musical work, etc., are also called ballet.

(1) Extended reading for introduction to ballet courses:

Body language of ballet:

1. Five basic positions of the feet:

< p> First position: Both heels are close to a straight line, and the toes are pointed outward 180 degrees;

Second position: The two heels are one foot's length apart, the feet are twisted outward, and the two feet are in a straight line Online;

The third position: place the heels of the two feet overlapping front and back, and the toes spread outward;

The fourth position: keep one foot of distance between the two feet front and back, and the toes of the two feet In two straight lines relative to each other, the legs turn outwards;

Position 5: The feet overlap front and back, the toes of the two toes touch each other, and the legs turn outwards;

2. Basics of the hands Position:

1. Vakanova School (Russian School)

First place: hands in a natural circle in front of the abdomen;

Second place Position: hands stretched out to the side, within sight, palms facing inward;

Third position: hands raised above head, within sight;

2. Quegedi Pie (Italian pie)

First place: Hang your hands down to form a natural circle, with your fingers lightly touching the position next to the thigh;

Second place: Stretch your hands at the side;

p>

Position 3: Place one hand in front of the body with the palm facing inward, and stretch the other hand to the side;

Position 4: Hold one hand in front of the body at the same height as the diaphragm, and then lift it up at the same time above the head. (When doing these movements, the hips must not twist, otherwise it will be considered impolite and inelegant)

Ⅱ Why should you learn basic ballet skills in college dance courses

Why should you learn ballet in college dance courses Basic ballet skills? Because learning to dance requires basic ballet skills, no matter what kind of dance, you must practice basic skills

Ⅲ What is the content of ballet pointe class

The origin of ballet body

———Excerpted from the May Day special edition of "Star Broadcasting" website

"Ballet" originated in Italy and flourished in France, so the word "ballet" is originally the English translation of "French" ballet , and its etymology is the Italian balletto, which means "jump" or "dance".

Ballet was originally a dance for mass self-entertainment or square performance in Europe. In the process of development, it formed strict norms and deconstructed forms. Its main feature is that the actress has to wear special pointe shoes. Dance on your toes. As a comprehensive stage art, ballet originated in Italy and was formed in the French court in the 17th century. French court ballet integrates singing, dancing, music, recitation and drama under a unified theme. In 1661, King Louis XIV of France ordered the establishment of the world's first Royal Dance School in Paris, establishing the five basic foot positions and twelve hand positions of ballet, which gave ballet a complete set of movements and systems. These five basic foot positions are still used today.

Whether in the practice classroom or on the stage, dancers wear professionally designed practice clothes. Although some costumes may change with fashion, for dancers, practice clothes are not just about looking good, each of them has a practical purpose. Tights and tights are the most basic practice clothing for dancers. In classical ballet, girls usually wear black leotards with pink tights. Some schools like to let their girls wear socks and various colored tights. Hair styles are also part of dance costumes. Girls in classical ballet like to pull their semi-long hair into a bun on the back of their heads, so that the lines of their neck and head appear very clear. Ballet soft shoes are made of soft thin leather or canvas and are worn by both male and female students before girls practice pointe. Girls wear pink and boys wear black or white. Shoes must be tight enough to cover your feet.

What is physical ballet?

Ballet originated in Italy and was formed in the French court in the 17th century. French court ballet has formed strict norms and structural forms during its development. Its main feature is that actresses have to put on special pointe shoes and stand on their toes to dance. In 1661, French King Louis XIV ordered the establishment of the world's first Royal Dance School in Paris, establishing the five basic foot positions and twelve hand positions of ballet, giving ballet a complete set of movements and systems.

In Europe, ballet has a profound impact on the behavior dynamics of social individuals. Whether one behaves elegantly or vulgarly has become the standard for society to measure individual civilization. With the development of society, the beauty of ballet is no longer just a pastime for nobles, but now it has become a new way of fitness, becoming more practical and practical. In some primary and secondary schools in our country, physical training courses with ballet training as the content have been opened. In the final analysis, ballet training is still a kind of limb movement, which improves aesthetic taste by adjusting the geometric positions of bones and muscle groups. It can be used to strengthen the body, adjust fatigue after exercise, or be used as a warm-up for other fitness classes, etc.

Ballet as a fitness method is commonly called body ballet. Body ballet is divided into beginner, intermediate and advanced courses for adults. The elementary courses focus on improving basic qualities and adjusting postures; the intermediate courses focus on training basic dance postures and musical sense; the advanced courses focus on training the feeling of dance and the perception of music. Most movements appear in the form of dance postures, and the whole class is accompanied by Performed to beautiful classical music, there will be a beautiful dance group at the end.

Anatomy and Observation of Ballet Body

From the perspective of anatomy, the scientific nature of ballet body training is also confirmed.

As mentioned before, the pelvis is the base of the spine. If you want to change the hunched posture, you must reduce the forward tilt of the pelvis. Whether the pelvis tilts forward or not is controlled by the gluteal muscles. When they are relaxed, the pelvis tilts forward, and when they are tense, the pelvis becomes upright. Therefore, one of the keys to correcting bad posture is to tighten the gluteal muscles.

Ballet body training can achieve this goal. In the natural state, the feet are facing forward and backward, and the supporting surface of the human body is a relatively large trapezoid. During ballet body training, the feet are opened 180 degrees outward, so that the supporting surface is squeezed into a long strip, which is much smaller. The smaller the supporting surface, the worse the stability of the human body, the tighter the muscles of the lower limbs and buttocks, and the pelvis will change from forward tilt to upright.

In addition, ballet body training also emphasizes the essentials: clamp the legs inward, tighten the quadriceps, and tighten the gluteus maximus. There are also corresponding supervision and inspection measures: it must be difficult to insert the palm between the legs, and the outer muscles of the buttocks must be in a concave state. These essentials all emphasize the active contraction of the gluteal muscles. If you can do this, then the tension of the gluteal muscles has reached a considerable level. The uprightness of the pelvis and spine is unquestionable?

Learn about ballet from here

The origin of ballet:

Ballet was originally a dance for mass self-entertainment or square performance in Europe. A strict standard and deconstructed form has been formed. Its main feature is that the actress has to put on special pointe shoes and dance on her toes. As a comprehensive stage art, ballet originated in Italy and was formed in the French court in the 17th century. French court ballet integrates singing, dancing, music, recitation and drama under a unified theme. In 1661, King Louis XIV of France ordered the establishment of the world's first Royal Dance School in Paris, establishing the five basic foot positions and twelve hand positions of ballet, which gave ballet a complete set of movements and systems. These five basic foot positions are still used today. Whether in the practice classroom or on the stage, dancers wear professionally designed practice clothes. Although some clothing may change with fashion, for dancers, practice clothes are not just for looks, each of them has a practical purpose. Tights and tights are the most basic practice clothing for dancers. In classical ballet, girls usually wear black leotards with pink tights. Some schools like to let their girls wear socks and various colored tights. Hair styles are also part of dance costumes. Girls in classical ballet like to pull their hair back into a bun so that the lines of their neck and head appear very clear. Ballet soft shoes are made of soft thin leather or canvas and are worn by both male and female students before girls practice pointe. Girls wear pink and boys wear black or white. Shoes must be tight enough to cover your feet.

Adult ballet fitness classes are based on the basic movements of ballet. By mastering several characteristics of ballet, such as open, stretch, straight, etc., all parts of the body can develop in a balanced manner, with graceful and straight postures, and at the same time, Accompanied by beautiful music, it enhances the sense of music, cultivates sentiment, and ultimately achieves the perfect combination of dance and music.

Let beauty not only appear on the outside or be hidden in the heart, we want beauty to be displayed intuitively and implicitly. As we all know, losing weight is not just about losing weight, but also about health, beauty, and style. It can be seen that having a good figure alone cannot meet everyone's aesthetic requirements. After we have a beautiful body, we must also improve our inner cultivation and Combining the inside and outside, so when we practice, we pay attention to the movements and also pay attention to cultivating the inner beauty.

Learn about ballet from here

Today’s urban women not only pay attention to beauty, but also pay attention to fitness. Ballet has become the new favorite of urban women. The white gauze skirt on the stage, the beautiful pointe, the difficult spins, the elegant curtain call, these ballet impressions that have always remained in my heart have accumulated into a distant imagination. I never imagined that I could touch ballet and feel its beauty and elegance. However, many white-collar women in Shenzhen are now beginning to attend fitness clubs to experience the enjoyment brought by this elegant art. After aerobics, ballet body training became popular in cities and became extremely popular.

From a kinematic point of view, ballet is an anaerobic exercise. Its bodybuilding strength is unmatched by ordinary fitness exercises. The three elements of ballet, jumping and straight ballet, have the function of contracting fibers, allowing people to practice The body becomes more slender, and excess fat is effectively consumed in a combination of dynamic and static exercises, creating a beautiful body, thus attracting many enthusiasts. Ballet training classes are mostly part-time and take place in the evenings and weekends. Accompanied by the melodious music, students wearing various training uniforms and dance shoes performed basic ballet movements meticulously. They bent over, stood on tiptoes, kicked, and every move was very serious. The legs were raised and rotated quite a bit. Ballet charm, intoxicated in the elegant artistic atmosphere. After a period of ballet training, most of the students have tall and straight postures, strong bodies, and their gestures and temperament are obviously better than ordinary people. In the past, weight loss with drugs, physical therapy, and weight loss exercises had certain effects, but they were costly. Ballet body training is not expensive and has no side effects. It is an excellent way to keep fit while making the body beautiful and elegant. Therefore, domestic ballet body training is booming and becoming increasingly popular, becoming a fashion pursued by modern women.

Body ballet can cultivate princess temperament

Body ballet can improve body shape and temperament "both inside and outside"

Maybe you have longed for a pair of ballet shoes since you were a child and fantasized about yourself Being able to spin on tiptoes on the stage. Maybe you are still worried about not being selected by the teacher when you applied for dance school because your figure was not perfect. Maybe you still love "Swan Lake" and "The Nutcracker"... It is actually a dream. The implementation is very simple. Nowadays, the popular body ballet classes in major gyms will make you feel that ballet is not far away from us ordinary people. Practicing ballet from a fitness perspective can not only fulfill your childhood dance dream, but also shape your body shape and develop your princess temperament. Why not?

Tracing the origin of ballet:

Ballet originated in Italy and flourished in France, so the word "ballet" is originally the English translation of the French "ballet", and its etymology is It is Italian, and balletto means "to jump" or "to dance".

Ballet was originally a dance performed for mass self-entertainment or square performance in Europe. During the development process

it formed strict norms and deconstructed forms. Its main feature is that the actress must Wear special pointe shoes and dance on your toes. As a comprehensive stage art, ballet originated in Italy and was formed in the French court in the 17th century. In 1661, King Louis XIV of France ordered the establishment of the world's first Royal Dance School in Paris, establishing the five basic foot positions and twelve hand positions of ballet, giving ballet a complete set of movements and systems. These five basic foot positions are still used today.

The difference between physical ballet and professional ballet:

Physical ballet is an extension of ballet. Professional ballet training is very boring, while body ballet is aimed at fitness and is less difficult. It does not require how straight the legs are kicked, how high the feet are raised, or how standard it is. It just teaches you how to use the unique characteristics of ballet. Integrate this elegant connotation into your own lifestyle. And from a kinematic perspective, the three elements of ballet, "opening, jumping, and straight", have the function of contracting muscle fibers. They can effectively consume excess fat in a combination of movement and stillness, making people's bodies become more slender after practice.

Therefore, although there is physical exertion and exercise, its movements place more emphasis on muscle endurance and body flexibility. The exercise intensity is not very high and can be accepted by most people.

Basic essentials of body ballet:

For a beginner, introductory courses of body ballet generally focus on improving the students' basic qualities and adjusting their body postures. After a simple warm-up, start training on basic qualities, starting with leg presses. In fact, leg press is not just for the graceful dance, but it also has many fitness benefits, such as: it can promote blood circulation, reduce muscle fatigue, shape muscle lines, etc. Leg pressing is a static stretch, and after each press, dynamic stretching (kicking) must be performed. Since kicking is a relatively strenuous movement, it also has the effect of improving strength and losing weight.

The standing posture of ballet is a very simple movement. It requires the shoulders to sink to highlight the beautiful lines of the chest and neck; it requires the legs to tighten and the waist to stand upright to make the posture upright and dignified... This In addition to being beautiful, simple actions can also directly help health and weight loss. Some students have caused damage to their bodies due to bad habits. For example, many people like to carry a backpack on one shoulder for a long time, which results in the development of two shoulders that are unbalanced (one shoulder is higher and the other is lower); another example is that many people misunderstand " The action of "raising your head and raising your chest" creates a "slumping waist and sticking out your buttocks". As a result, the psoas muscles become weak and the abdomen becomes increasingly protruding. In addition, incorrect exertion is likely to cause premature aging of the waist. The ballet stance can make you feel like you have grown a few centimeters taller, making your body look more graceful. The coach will tell you when you are practicing: Imagine that you are a princess, very noble and beautiful... Through such "internal and external training", your body and temperament will be developed.

If you are interested, you can dance ballet

Spacious rehearsal hall, barre, floor-to-ceiling mirrors...hand positions, small jumps, pointe, rotation...at the Central Song and Dance Troupe No. 9 In the rehearsal hall, the reporter saw a group of ballet lovers. They did not have the graceful bodies of professional dancers, and their dance movements also had some flaws. However, they were meticulous. Looking at these smiling faces intoxicated with them was enough to make people feel the bloom of life. of beauty.

Ordinary people can also dance ballet:

Ms. Xun, 36, is a manager of a real estate company. She spends her days either in meetings or working at her desk. In other words, the muscles seem to have memory and need to be released at this time every week. Ballet has become a part of life. She thinks ballet is a good way to relieve stress. Dancing allows her to put aside all her troubles and integrate into music and dance. She said that teachers often tell everyone to overcome difficulties and persevere when practicing ballet. "Actually, I don't feel the pain of perseverance, but enjoy the process."

52-year-old Ms. He has been practicing ballet for 6 years. Among a lot of young girls, she does not look old at all. She also performed a standard lower split for reporters. She said that practicing ballet not only relieves stress at work, but more importantly changes her mood, making her feel young from the inside out. Compared with her peers, she hardly feels the transition to menopause.

Ms. Chen Xiuzhu, a former national first-class performer at the National Ballet of China, is their teacher. During the interview, she told reporters that many people think that the threshold for ballet is too high and dare not take part in it. In fact, ordinary people can practice ballet. As long as they are interested and do not have high blood pressure, heart disease or other diseases, they can practice ballet. Especially for white-collar workers in office buildings who are under high work pressure and often in a sub-healthy state, it can have a very good regulating effect.

More exercise than volleyball

Talking about the benefits of ballet to the body and mind, she said, first of all, the practice method of ballet is step-by-step, from a simple hand position to small jumps and medium jumps , big jump, to leg skills such as hitting, single-leg rotation, etc., the muscles of the whole body are tightened in the open state, the hips and abdomen are tightened, and the muscle ability is strengthened. Second, practicing ballet emphasizes "opening, tightening, and straightening" (opening, tightening, and straightening the entire body). Long-term practice can lengthen muscle lines, giving people a tall and straight posture, making them appear confident and powerful. Third, it can enhance the body's control ability and make people with a hard body become more flexible. In fact, tests by sports authorities have shown that the amount of exercise in ballet even exceeds that of volleyball, which can increase people's lung capacity, speed up blood circulation, and enhance cardiopulmonary function.

Teacher Chen Xiuzhu is 62 years old this year. She practices ballet for 40 minutes to an hour every day. She has a wide range of hobbies, including mountain climbing and horse riding, and her physical strength is no worse than that of young people.

Professional guidance is needed

Finally, Teacher Chen reminded everyone that beginners are easily injured if their physical flexibility is not up to standard, so they must learn under the guidance of professional teachers and learn scientifically. train. In addition, ballet must be practiced in a professional dance studio. The floor has a special multi-layer keel structure, so dancers are not easily injured when they bounce and land.

//wdzj/

//woo/

//05005!

//gd-dance.e

//shballet/

//ddzw/video/teaching/2006-02-14/1139882038d76446

Ⅳ What are the basic skills of ballet

Basic ballet skills are divided into three categories: ground quality training exercises, barre up exercises, and barre down exercises;

Ground exercises include:

Instep stretching exercises: The secret to the beauty of pointe lies in Instep – The top of the foot from the ankle to the toes. When the toes are stretched, the instep will bulge into an arch. The beautiful ballet instep will have a stunning arch. Stretch your toes: Straighten your toes downward, becoming an extension of the curved arc of your feet. Stretch out as far as possible and make the line as long as possible. Stay in this position for a few seconds. If your feet feel cramped, relax. As shown in the picture above

Ground quality exercises also include: hooking the instep, crossing the feet and pressing the crotch, lying on the back to suck the legs, lying on the side to suck the legs, lying on the side to suck the legs, waist training, lying on the front to kick, press the legs, Kicking, lowering the waist, etc.;

Upper bar exercises: floor wiping exercises, squatting exercises and leg pressing exercises, the main means of shaping the beauty of posture;

Lower bar exercises: hand positions and Foot position training, such as wavy dancing of the arms, circular motions of the feet, as well as steps and pointe training.

When you first start practicing basic skills, it will be more difficult and painful, because you have not practiced before, and the strength of your body is not very strong, so it will be more strenuous, but you must persist. As long as you persist well, you will not be able to pass it. It won't take long for you to feel better, and you won't have the initial pain anymore. As long as you get through this, everything will be easy to learn.

Ⅳ Where are the professional ballet courses in Beijing?

Each dance training class has its own advantages and disadvantages, and there are differences in registration for different groups of people. Children at home who are new to it are the ones to choose. Yibo Tongcheng has a warm teaching environment

, excellent teachers and reasonable course arrangements. You can try it out before signing up.

Ⅵ What theme courses are available at Swan Lake Ballet

There seemed to be several good themed courses in the past, such as "Swan Lake", "The Little Mermaid", "Frozen" and "Sleeping Beauty" ", etc., but generally there are quotas for such theme courses. If you are interested in participating in such courses, you must always pay attention to them

Ⅶ What courses should beginners of ballet take?

< p> I have studied ballet. I am level 3 and have been practicing for 6 years. Beginners should practice foot position, hand position and some basic instep skills. Don't practice big jumps, horizontal turns and so on. This is not the training. At that time, when I first started learning, I had to train hard in order to be able to practice ballet well. It hurt and was very hard at the beginning. Ballet is about perseverance and perseverance. You have to persevere!

Ⅷ What are the basic training methods of ballet?

The basic training methods of ballet include ground quality training (foot hooks, leg presses, kicks, etc.), barre exercises (barre exercises) Bar exercise), under-bar exercise (off-bar training/middle exercise), etc.

Basic ballet training has a complete and scientific training system, and each combination has different training values. It is a set of scientific and complete training materials.

Basic ballet training courses are an important part of dance teaching. Basic ballet training is standardized, systematic and scientific, with specific step-by-step training methods and unified and perfect aesthetic standards. For dancers, basic ballet training is very important, as it can help dancers develop and improve in an all-round way.

(8) Introduction to Ballet Courses Extended Reading

The style of ballet has been developing since the Italian Renaissance. In the early days, classical ballet changed mainly due to different geographical origins, such as the Russian school, the French school and the Italian school.

Later changes included classical ballet and non-traditional techniques and postures, such as contemporary ballet and neoclassical ballet. The most familiar and most frequently performed style is romantic ballet. It is a classical style centered on female dancers and pointe skills. It is famous for its smooth and accurate dance postures. It is often used to symbolize female dancers wearing short white. Image of tutu.

Ⅸ In children’s ballet class, what should be included in a class? Is it all ballet?

If it is a professional ballet class, it will be all ballet. If it involves other content, you can also use basic ballet training as the basis for dance training. Ballet classes have a lot to offer. A few methods are briefly introduced:

If you are teaching a professional ballet class, it will be all about ballet. If it involves other content, you can also use basic ballet training as the basis for dance training. Ballet classes have a lot to offer. A few methods are briefly introduced:

First of all, children are required to have body softness and openness. Including, head, shoulders, chest, waist, hips, legs and feet. All need to be trained.

Softness training: head (front, back, left and right), leg press (front, side, back), shoulder press, chest and waist press, lower waist, lower horizontal and vertical crosses.

External opening exercises: shoulder movement, hip pressure (crouching on the front and back), leg movement (front, side, back), instep hooking, and instep pressure.

The first step is to practice on the barre: one person, two people wipe the floor, squat, and practice.

The second step, step barre exercises: one-position, two-position, three-position scrubbing, squatting, control, and half-toe exercises.

The third step, step barre exercises: one to five positions, wipe the floor, squat, control, strike, circle, turn, half-toe and other exercises.

Intermediate exercises: Do one to five people in the middle, wipe the floor, squat, control, strike, circle, turn, half toe, large and small jumps and other exercises.

For the ending music, you can choose some minor dance music, ballet combinations, etc. suitable for children. If you are teaching other content, you can also choose some classical dance, folk dance and modern dance music suitable for children.

What should be noted is: when practicing soft opening, the hands should be light and accurate, the force should be concentrated and even, and students should be taught in accordance with their aptitude.

When practicing external rotation, it is from top to bottom, which means that the hip joint ball and socket rotates externally under the control of human nerves and muscles. At the same time, the muscles surrounding the femur rotate externally to drive the knee. And the ankles are also turned away at the same time. If the external opening force is not initiated from the acetabular joint, it will force the legs to twist at the knees, unable to straighten the knees, slumping the waist, inverting the feet and other bad posture habits. As the hinge joint of the leg, the knee is easily injured if it is forced to rotate frequently. Pay attention to correct students' incorrect posture.