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Research on the Kinematics of Frontside 540air of Half-pip of Snowboard in Our Country

Author: ZhangYuMing
Tutor: ZuoHongGuang
School: Shenyang Institute of Physical
Course: Of Athletic Training
Keywords: U-shaped venue snowboarding technology Positive feet to 540 ° Kinematic analysis
CLC: G863.1
Type: Master's thesis
Year: 2010
Downloads: 50
Quote: 0
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Abstract


Objective: To reveal the veneer U-shaped venue skiing positive feet 540 ° blade action technical characteristics, technical key and kinematic parameters , thereby scientific guidance training , and lay a good foundation for the athletes to get good grades . Research methods : use of image analysis for Liu Jiayu , SUN Zhi-feng , Cai Xuetong three athletes being foot front edge of the kinematic parameters of 540 ° . Results: Athletic parabolic trajectory of the body center of gravity in the action stage , in the slot before the maximum speed of 10m / s around a groove angle of 55 ° , the twist in the flight phase theoretical point of view the actual swivel angle deviation of about 80 ° , landing a maximum speed of up to 14m / s. Conclusions: 1 , athletes out groove technology is good or bad determines vacated height . In a groove technology , the center of gravity of the sliding speed , the angle of the groove tread wall force size and push off timing of the impact of the height of the crucial factors . Groove out stages , you should try to reduce the speed and direction of the deviation with edge , body weight should be the same as far as possible with the sliding direction , in order to reduce the loss of speed . 2 , due to the characteristics of the site slope and athletes slot direction differences in the actual technical movements , air swivel the theoretical angle with the actual swivel angle deviation . Technology as a prelude to a groove technology to help slip sliding direction and trajectory have a great impact on the quality of the out slot , ideal for skiing stage taxiing route straight glide to avoid arc or S-type . 4 , the groove stage push off the best time to leave for the mid - point of the skis corner moment , while landing more appropriate position is closer to the corner . 1 , in a slot instant , push off the effects of the action by the lower limbs kicking the power to decide , therefore appropriate to strengthen leg muscles help to improve the athletes out of the slot speed is recommended . , Athletes exist swivel degree of deviation , in imitation of the training should be read in conjunction with the actual twist degree , athletes forming operation of stereotypes

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