| Ojectives: In Taekwondo,rotary kick is one of the most common movements.With the increasing difficulty of movements,from low to high,it can be summarized as 180-degree rotary kick(backward kick)?360-degree rotary kick(whirlwind kick)?540-degree rotary kick(540-degree backward kick in the air)?720-degree rotary kick(720-degree rotary kick in the air)?900-degree rotation Among them,backward kick and whirlwind kick are both basic attack techniques in Taekwondo.Almost everyone knows that the technical movement of Taekwondo's height,rotation and horizontal kicking is not practical and winning,but few people can tell the reason and the secret with data.The purpose of this paper is to test the scientific indicators of attack power and success rate in the five grades of rotary cross kick from 180 degrees to 900 degrees from the perspective of dynamics,reveal the similarities and differences of attack validity between actual combat rotary cross kick and performance rotary cross kick,and draw scientific conclusions and explanations from them,so as to guide the training of Taekwondo athletes more reasonably and promote the development of Taekwondo.Methodology : Collected two athletes from Taekwondo team of Wuhan Institute of physical education were selected to make statistics on their physical condition data and make dynamic experiments.The instruments to test the strength were installed in the target to be kicked.The two athletes completed the rotating horizontal kick of 180 degrees(back spin kick)? rotating horizontal kick of 360 degrees(whirlwind kick)? rotation of horizontal kick of540 degrees(air backward spin of 540 degrees)? rotation of horizontal kick of 720 degrees(air spin of 720 degrees)There are 11 movements in the five levels of rotation kick ?rotation horizontal kick(900 degree air backward spin kick),and each action is completed 10 times.Through the statistics of the attack power and the success rate of each action of the 11 movements of the two athletes,the difference of attack power and success rate of the five levels of action was compared.Finally,the less difficult rotary cross kick 180 degrees(back spin kick)and rotary cross kick 360 degrees(whirlwind kick)were classified into one type-actual combat type,and the more difficult rotating horizontal kick was 540 degrees(540degree air backspin)Kicks),720 degrees of rotation and cross kicks(720 degrees of air spin kicks)and 900 degrees of rotating horizontal kicks(900 degrees of air spin kicks)areclassified into one category-performance.By comparing the attack power and success rate of the two kinds of rotating and horizontal kicks,this paper sums up the specific scientific reasons for the non combat nature of performing Taekwondo actions.Research results:1.The success rate of competitive spin cross kick is 100%,the action stability is good,and the attack effectiveness is also high.2.The difficulty of performance type rotating cross kick gradually increased,the success rate decreased significantly,the action stability became worse and worse,and the attack effectiveness was also lower and lower.3.The 360 degree whirlwind kick is the most practical,and the 900 degree air spin kick is the worst.The attack effectiveness of the two can be several times different.4.The increase of attack times will seriously affect the success rate of the action,even can be reduced to 0%.5.Competitive Taekwondo and performance Taekwondo are essentially different from each other in terms of dynamics and statistics,but they complement each other and depend on each other.Conclusion:1.There are obvious differences between Taekwondo's competitive winning attribute and Taekwondo's performance aesthetic attribute.Rotating horizontal kick is not used frequently in Taekwondo's competition winning.However,as long as it is used,it is also for attacking and changing on the basis of greater attack power in order to score points.However,rotating horizontal kick with more than 540 degrees,which is more cool,fancy and beautiful,cannot be applied to actual combat competitions.As a kind of performance and aesthetic nature,it exists.2.With the improvement of the difficulty of the action performance and the increase of the degree of rotation,the attack effectiveness of the rotary kick is gradually decreasing,showing an inverse relationship between them,that is,the greater the difficulty of the action,the smaller the attack power,the lower the success rate,and the worse the stability of the action,and vice versa.Aaekwondo and performance Taekwondo are essentially different from each other in terms of dynamics and statistics,but they complement each other and depend oneach other,The attack effectiveness of the rotary kick is gradually decreasing,showing an inverse relationship between them,that is,the greater the difficulty of the action,the smaller the attack power,the lower the success rate,and the worse the stability of the action,and vice versa.3.The rotary kick of performance class,that is,the rotary kick above 540 degrees(including 540 degrees),is not meaningful to win in actual combat.Because of the reduction of success rate and attack power,the attack validity can even be reduced to only a few tenths of that of competitive rotary kick.Generally speaking,backward kick and whirlwind kick are not common and commonly used winning techniques and winning strategies in actual combat competitions.They are easier to be used unless the score is leading or occupying obvious advantages,not to mention the high-difficulty rotary horizontal kick above 540 degrees...However,in terms of performance aesthetics,the more difficult the rotary horizontal kick is,the more attractive it is to the audience,the more expressive,aesthetic,rendering and spreading,making Taekwondo a sport. |
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