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Kinematic analysis on body posture of tennis two -handed backhand stroke tech-nique
Pages: 79-83
Year: Issue:  6
Journal: Journal of Shandong Institute of Physical Education and Sports

Keyword:  tennistwo -handed backhandbody posturekinematic analysis;
Abstract: This study selects 10 national -level players of two -handed backhand stroke as research subjects,obtains 3D pictures of movement process and ball speed while the players are employing double backhand stoke technique by using 2 Sony cameras of HDR -HC5 mode,and introduce kine-matic analysis of stroke technique of body posture and ball speed by applying video image analysis system.The results show that 1)The players adapt to the height of shot by adjusting the angle of an-kle joint and knee joint;2)the players bend the knee of driving leg to lower the center of gravity in racket preparation period while raise the center of gravity in rotating shot period by shifting forward the ankle joint of driving leg and stretching the hip joint of supporting leg;3)the extension of shoul-der and elbow angle of the force exerting arm can increase the effective rotation radius of racket head;4)players can improve the potential energy reserves of body rotation and increase racket force by controlling the angle between shoulder and hip.
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