ABSTRACT
ABSTRACT: Step movement for return of service in tennis is a general term for various actions adopted by player to control body, and change position, direction and speed. The movements of footwork for return of serve of three players in the finals and semifinals of 2011 Chengdu Open-ATP Champions Tour were filmed and analysis with three-dimensional video analysis. The actions are divided into three stages, preparation phase, skip step phase and stroke phase, so as to analyze the main kinematic parameters. The kinematics characters of footwork were presented to providing the basis for tennis training and match. Research shows us: In the preparation phase, the average horizontal angles between the two feet of Sampras, El Aynaoui and Moya are 12.1 deg., 2.2 deg. and 45.6 deg. respectively, and the distances between the two feet are 0.465 m, 0.874 m and 0.583 m respectively. In the skip step phase, the maximum jumping heights of Sampras, El Aynaoui and Moya are 0.101 m, 0.175 m and 0.091 m respectively, the horizontal moving distances of their left feet are 0.501 m, 0.400 m and 0.437 m respectively, and the average moving speeds of their left feet are 1.139 m/s, 1.333 m/s and 0.491 m/s respectively. In the stroke phase, the moving distances of left feet of Sampras and Moya are greater (0.892 m and 0.667 m respectively) and the moving speeds of Sampras and Moya are faster, being 2.23 m/s and 1.96 m/s respectively.
