Kinematics Analysis Of Rumba Cucaracha Technical Movements

Purposes: When 12 Latin dance athletes perform the technical movement process of the rumba kuklacha,this study compares and analyzes the kinematic parameters of the trajectory of the center of gravity,the characteristics of the center of gravity displacement,the velocity of the center of gravity,the angle of flexion and extension of the lower limb joints,and the velocity of change of the lower limb joints.It also examines the issues that arise during these movements.The study’s theoretical underpinnings will promote the use of abstract language descriptions in instruction and training.Methods: The motion infrared light point high speed motion capture device was used to gather information on the movements of athletes in the high level group and the general group based on a thorough examination of the literature.There were six athletes in the high level group and six in the general group.The experimental data were pre-processed using Cortex software,statistical and functional calculations were finished using Excel 2016,and independent sample t-test analysis was finished using SPSS 20.0 before examining the differences in data indicators between the two groups of athletes.Results:1.Center of gravity displacement characteristics: While the center of gravity shifted less and the displacement changes in the preparation and end phases were more stable in the high level group than in the normal group,the displacement distance in the left and right directions was significantly greater in the high level group than in the normal group at the beginning and the center of gravity transfer phase.2.Center of gravity speed characteristics: Under the same rhythm,the high-level group’s center of gravity displacement speed was generally faster than that of the general group,and the mid-range transition was coherent and sufficient;in the vertical direction,both groups struggled with the problem of the center of gravity’s rapid vertical descent in different movement phases,but the center of gravity’s overall control ability was still good.3.Joint angle characteristics: The high level group and the normal group both had some similarities in the joint angle changes of the right hip,right knee,and right ankle in the flexion and extension angles of the lower limb joints;however,the high level group’s right knee’s joint angle in the right knee extension characteristic moment was significantly larger than the normal group’s.4.Joint speed characteristics: At the start of the movement phase,the high level group’s right power leg stirrup speed was faster,and its right knee and right ankle joint displacement speed were noticeably faster than those of the normal level group.At the end of the movement phase,the normal group’s three joint movement speed pattern of the main leg was noticeably presented: hip > knee > ankle.Conclusions:1.High-level group of athletes in situ action between the main leg and the floor of the storage capacity is stronger,the center of gravity to the left and right direction shift less,the vertical state of the spine is good;and in the mobile technology is also more adept at using the floor force to produce significant displacement changes.Body weight is closely related to the floor.2.The speed of center of gravity fluctuation in the vertical direction is slow,and the core muscle groups have strong ability to neutralize the up and down fluctuation,and the trunk control is stable.High level group athletes have short and fast center of gravity in the left and right direction and front and back direction,and are good at using the floor reaction force to produce rapid displacement.3.There was some similarity between the hip,knee,and ankle joints on the left and right sides in the flexion and extension angles of the lower limb joints between the high level group and the normal group;the right knee joint of the high level had a greater angle after changing from flexion to extension,and the knee joint had a significant advantage of stirrup extension.4.High level athletes typically move their lower limb joints faster and with more explosive force in each stage of their movements,but they tend to ignore the rule that states that the knee joint rotates in sync with the hip joint and the hip joint rotates in sync with the knee joint when the main leg is rotating.