1. Stage dance originated from labor and mainly expresses people's thoughts and feelings. Dance always vividly reflects people's different thoughts, beliefs, ideals and aesthetic requirements. Stage dance is not only an art form for people to enjoy and entertain, but also has the social function of publicity and education. Dance is a kind of performing art and the art of human movements. However, this human movement must be refined, organized and beautified-dancing human movement. Complete all kinds of elegant or difficult movements with your body. Dancers should have difficult skills such as jumping, spinning, tumbling, softness and control. However, performing difficult technical movements in dance works is not an end in itself, but a means to express the thoughts and feelings of characters and shape their character and mental outlook. If you are performing on the stage, lighting and scenery are also indispensable. Therefore, it can also be said that dance is a plastic art with space, time and comprehensive dynamics.

2.( 1) Aerobics has the characteristics of "artificial". The form of aerobics is that people artificially create movements to practice according to their own needs. Aerobics can be scientifically adjusted by changing body posture, movement direction, movement direction, movement route, movement frequency, movement speed and movement rhythm, so as to achieve the purpose of strengthening physical fitness.

(2) Aerobics generally has five characteristics:

① Practice is easy to learn and understand, suitable for different age groups;

(2) emphasize symmetrical movements and repeat exercises;

(3) Emphasis on large-scale exercise;

(4) Group practice;

⑤ It has a lively rhythm and forms a dynamic and rhythmic style.

Aerobics can be divided into two categories: fitness and competition. Fitness aerobics aims at fitness exercise, while competitive aerobics aims at training according to rules, and finally to participate in competitions. Men's aerobics pays attention to the training of shoulders, chest, back and abdomen; Women's aerobics pays attention to the training of upper chest, waist, abdomen and buttocks. Aerobics for young men and women is strong, extensive, expensive, elegant and full of characteristics of the times, and is deeply loved by young people.