关键词: 刘虹, 竞走, 关键技术, 运动学, 里约奥运会

Abstract: By way of literature review, three dimensional photography, video analysis, the present paper studies the technical features of Liu Hong’s 20km race walking in the 2016 National Race Walking Grand Prix and Olympic Qualification Competition in the hope of providing reference for athletes’ competition in the Rio Olympic Games. The results show that Liu Hong’s techniques are standard and effective on the whole. Her techniques have the following features: her flight time span is within the fuzzy time limit, while her flight time at the sprint stage is far over the threshold value as a result of accelerating. Her head’s vertical motion is large, and both her knee angle and vertical knee joint angle are small while her swing leg is off the ground. The faster her center of gravity moves, the smaller her knee angle is. This makes her walking look more like “running”. Her landing technique meets the straight leg standard, and her “reverse bow” act during the vertical supporting phase is obvious. The effectiveness of Liu Hong’s techniques is as following: both her left and right step distance increase, it greatly changes the traditional style of “small step and high frequency”;but the left-and-right imbalance remains unchanged. The angle between the thighs is small, indicating that Liu Hong’s technique for hip propulsion is yet to be improved.

Key words: Liu Hong, Race Walking, Key Techniques, Kinematics, The Rio Olympics