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Biomechanical Research of the Start of World-Famous Skaters in 500m Short Track Speed Skating

Author: LiuShan
Tutor: LiuHui
School: Beijing Sport University
Course: Human Movement Science
Keywords: Short Track Speed ??Skating Start of a race Three - dimensional image analysis Sports Biomechanics
CLC: G862.1
Type: Master's thesis
Year: 2010
Downloads: 112
Quote: 0
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Abstract


Starting an important part of the short track speed skating, is an important factor in the excellent results achieved. Especially in the 500m race, the start has a decisive role to win games. In order to ensure the fastest players from rest to enter the high-speed roll stage itself has good endurance explosive qualities, in addition to the requirements of the players, but also reasonable action structure. The action structure helps to control equipment in the game, to win. Through the research start action of the outstanding short-track speed skaters in the world body posture and movement characteristics of the link, start the process of joint angle, joint point speed and displacement of the center of gravity and other indicators in the process of starting kinematic characteristics, the use of mathematical statistics to discover the laws, provide the basis for the technical evaluation and training. In this paper, three-dimensional fixed-point imaging method using two JVC-3000 normal speed cameras in the short track speed skaters race conditions starting three-dimensional DLT shooting, shooting frequency of 50 Hz. Application Peak three-dimensional calibration framework for athletes starting area calibration. Video video analysis system for analysis, be calculated with QTOOLS software. The findings and conclusions: 1. Starting stage time will have a significant effect on the the starting total time and the competition results. Shorten the time to start the first complex step, especially start-up time, the second skating effect, raise the legs during the double support motor coordination, can effectively improve the the 500m competition results. (2) the height of the center of gravity in the vertical direction and the horizontal velocity between the existence of a significant association, two steps before starting this stage, the center of gravity lower and less volatile athletes get better acceleration. 3 start, kicking the ice area and upper body anteversion are two important factors that affect the starting speed. The starting lower anteversion angle is conducive to skating push action carried out to obtain a larger initial velocity, and enter the starting second half of the skating angle decreases rapidly, give full play to leg strength in the sprint stage to obtain greater acceleration. This research was supported by the characteristics of the movement of the lower extremity joints in the two-step process before the start of the outstanding short-track speed skaters. The object of this study of six athletes in the left leg in the first full gait (front legs) side of the ankle joint angle is much smaller than the right leg (hind leg) side of the ankle angle variation. Athletes skating kicking the ice legs hip and knee angular velocity and speed of the center of gravity of the athletes have a direct link.

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CLC: > Culture, science,education, sports > Sports > Water,ice and snow sports > Ice sports > Speed ??skating
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