Biomechanical Characteristics Of Lower Limb Of Tennis Forehand Swing

Tennis is a fine movements, technical and tactical complex against intense, physically demanding combat-related projects across networks. Good tennis player needs to have good physical fitness, stamina, superb technology, and flexible tactics, experience and good mental qualities. Tennis serve, forehand and backhand is a tennis ball the most fundamental way, both the beginner entry level of technology is also used to score the majority of athletes, the primary means of winning. The sport of these basic movements of the research, teaching and training for tennis and technical theory, the rich, as well as tennis popularity of sports among the masses of great significance.At present, the world's best players when they hit the choice of a high frequency of developing type-step, and the phenomenon is more mainstream in today's world tennis trends. Study of open-forehand move lower extremity gait kinematics, dynamics, characteristics, and lower limb muscle EMG activities of the major characteristics that can be further enriched and improved technical basis tennis biomechanical theory provides a basis for future research as well as tennis movement in the lower limb injury to provide some data to support.This study object of study in Beijing University of Physical Education 7 2 special athletes tennis forehand biomechanical characteristics of lower limb movements. This study is to simulate the actual conditions of hard-hitting situation, using high-speed camera Qualisys infrared camera system, Kistler force plates, and Mega for simultaneous testing of the surface EMG recorded lower limb kinematics, kinetics and surface EMG data, using a the system comes with software and Excel, SPSS software tools such as parameter calculation and analysis, the followingconclusions:1, tennis forehand stroke movements, starting from a different starting position in the ground when they tend to choose small-to-ground impact on the ground and more gentle mode of landing. 2, different starting position running the final batting point near the ball ready to hit the ball touch the ground when the collision with the ground a similar situation. Shot from a different place starting position, touch the ground after the foot with the ground force interaction in the situation is not the same, the farther away from the sweet spot, the role of feet and the ground reaction forces generated in the process the greater the vertical.3, vertical loading rate, and ran into the direction of the force loading rate, with the distance from the ball-point increases. The ball ran across the entire bottom length of the highest risk of injury occurrence.4, especially the medial gastrocnemius head forehand moves in the lower limbs with the ground to play a major role in the interaction, the role of the rectus femoris muscle is relatively low.5, lower limb muscles in the pedal extension phase significantly reduced the activity, making the body in the process of batting swing try to keep the previous stage to reach the state for the benefit of batting guarantee of quality.