The unique BOUNCE movement of Samba is produced by the knee and ankle of the center of gravity foot flexing and straightening each other. Each time the knees and ankles are flexed and straightened, a l/2 beat is used, and the angle of flexion varies from step to step, sometimes "slightly" and sometimes "not at all".
Another difficult movement is the pelvis and hip thrust. Without these two movements, it is difficult to show the samba. Samba movement must reflect a "parade" of partners surrounding each other and interacting with the audience while moving or dancing in a fixed position.
It is important to focus on the right amount of muscle relaxation and center of gravity. Physical and mental tension will not bring out the lively, passionate samba.
Expanded Information:
Samba originated in Africa. The word "samba" is said to have evolved from the word "samba" in the Kimbundu language, the second largest tribe in Angola, Africa. "Samba" was originally a kind of exciting belly dance.
As the name suggests, the dance is characterized by up-and-down belly shaking and hip shaking. It was one of the most popular dance movements in Angola and began to spread with the rise of the slave trade, which took 12 million slaves from Angola and other parts of Africa to Brazil by Portuguese colonizers over 300 years from the 1630s to the mid-19th century.
When stuffing black slaves into the holds of ships bound for the newly discovered continent of Latin America, white slave traders feared that the long journey, with the slaves nestled in the holds for dozens of days at a time, would be too leggy to sell at a good price when they arrived on shore.
Therefore, they rushed the black slaves crowded in the cabins to the deck every day, and to the accompaniment of banging on wine barrels and iron pots, they made them dance a samba to move their muscles. In this way, the colonizers' move, which was intended to enhance the bidding power of the special commodity of the Negro slaves, inadvertently brought this dance, popular in Africa, to Latin America.
Baidu Encyclopedia-Samba