Mechanics principle of Ala C Bar in cheerleading and its application
An"Ala C bar"presents a body rotation difficulty of cheerleading,which has a very important position in cheerleading sets.In order to find out the mechanics principle of an"Ala C bar"and provide a scientific basis for its training methods and evaluation criteria,the human body model of an"Ala C bar"motion process is established based on the theory of robotics,and the motion planning and kinematic simulation of the motion process are carried out.Then the Lagrange equation is used to establish the dynamic model of the"Ala C bar"movement.Aiming at an ideal motion state,the driving force of the main joints in the process of"Ala C bar"movement is analyzed.Finally,according to the dynamic simulation results,the influence of three types of hand movements,double-arm opening and closing,single-arm opening and closing and big-small T,on the driving force of each joint of the body is compared.The analysis results show that the power leg is the main power source of the"Ala C bar"movement,and the driving force of the power leg hip joint is not affected by the hand movement.Among the three types of hand movements of double arm opening and closing,single arm opening and closing,and big-small T,big-small T requires the least joint driving force.This study provides a theoretical basis for the training and evaluation of an"Ala C bar",which can be used for a reference by practitioners in the training process.
cheerleadingAla C barprinciple of mechanicsexercise planningmodel of dynamics
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