关键词: 短道速滑, 武大靖, 弯道, 运动学

Abstract: The curve technique is one of the most important movements of the short track speed skating technique and plays a vital role in the whole process of the competition and can improve the athletes' performance. The average speed of an excellent short track speed skaters is above 13 m/s and the speed in the curve is greater than the straight.Compared with the straight technology,the curve technology has to overcome the inertia of the human body, therefore, in order to has a better understanding of the technical and tactics of the curve, we analysis the competition of Wu Dajing at the 2017/18 ISU World Cup Short Track(Shanghai), the results show that :(1)During the curve the athlete did not gliding close to the track, but take the sliding mode of the big turning radius, Wu Dajing's radius is 11.41 m, so the actual sliding distance is greater than the specified distance of the game;(2) After entering the curve, the athlete's body must be introverted, when the internal inclination angle is 39.85°, Wu Dajing’s left hand touched the ice surface, thereby increase the stability of the human body and maintain the balance of the body. The minimum introversion angle is 25.84°, indicating that he has good ability of body tilt and balance ;(3)The alternating of pedal ice of the left and right legs makes the torso angle change slightly, compared with the excellent female short track speed skater, Wu Dajing’s torso angle is more reasonable. Because he always be the leader in the competition, to has the proper reduction of the trunk is needed to reduce the air and it’s an effective method to save physical energy;(4)Wu Dajing's hip joint angle is small at the time of touch ice (the torso angle is small), and the air resistance is reduced. The double support phase is the acceleration phase, while the single support phase is the deceleration phase, which is consistent with the excellent athletes' sliding mode at home and abroad ;(5) Wu Dajing's minimum ice angle appears at the end of the single support phase; the height of the center of gravity from the curve to the top of the arc is continuously decreasing; the time of the double support phase is less than the time of the single support phase, and the right single support phase is longer than the left single support phase.

Key words: short track speed skating, Wu Dajing, curve, kinematics