| Throughout badminton skill and tactics development history, it is clear to see both of them in singles or doubles matches with a strong smash lethal technology, especially technology has been killing the ball in the backcourt became an important means of scoring the game. Kill the ball technology has the speed, strength, route, point of view, and other changes in style of play, which is the biggest smash attack after the ball. So, after killing the ball field technology has better efficacy than other technologies, the most important is to concentrate can be directly reflected in the score, creating a favorable scoring opportunities, inhibit each other's attack and so on.In this paper, the method for three-dimensional video games, after killing the ball badminton Kinematic data and synchronous acquisition involved in the major muscle movements EMG, in revealing the back of the court vacated the basic principle of technical movements to kill the ball at the same time, after the field of badminton kill ball technology, the laws and characteristics of muscle activity were analyzed to explore the characteristics and effects of muscle force to kill the ball movement speed and quality of key factors, which reveal a more in-depth and comprehensive nature of the action to kill the ball technology features.The experiment results and analysis, the body rotation angle in the pre-swing and the flight phase has a small range of rotation, when the center of gravity to the highest point, the rapid turn around quickly whipped twist, this time a larger range of body rotation, rotation angle is greater than at this time and the first two stages. In the final stage to improve the body rotation velocity, in order to improve the speed of hand instantly shot to bring the racket face to improve ball speed and power.Hand and the correlation coefficient of body's rotation velocity is 0.736, for significant correlation, indicating that the faster the twist angular velocity, the faster the last hand. Law of upper limb movement started by shoulder movement, followed by the elbow, wrist, hand, and the speed increases, in line with the principle beat action.Through the eight muscles measured the average size of the order of IEMG is: deltoid, trapezius, biceps, triceps, brachioradialis muscle, the latissimus dorsi, flexor muscle, erector spinae, spinal muscular bundle. Muscle discharge order are:erector spinaeâ†'trapeziusâ†'deltoid muscleâ†'bicepsâ†'latissimus dorsiâ†'tricepsâ†'brachioradialis muscleâ†'flexor muscle.The action of the muscle groups in all aspects of the discharge is into the regular changes in different aspects are presented under the phased release point. By phase analysis of all the movements, biceps discharge waveforms are significantly high amplitude phase of the three; triceps and shoulders only turn when the elbow showed a strong swing discharge; brachioradialis muscle swing in tempo to turn back the process of developing the performance of the wrist and a strong wrist shot put points; flexor muscles before and after the stroke showed a strong discharge; trapezius, spinal muscular bundle, latissimus dorsi muscle in front of the racket, the body "back bow "stage and the final moment of the discharge stroke is more obvious, other times put some more weak. Shoulder is the upper limb and trunk of the junction, in the muscles of the shoulder joint during movement IEMG value most. Deltoid muscle during the development effort in the action has been larger and longer discharge time, is the place vacated strong forehand smash the major development effort muscles. Deltoid muscle plays a connecting link in the action role in the process, thus strengthening the deltoid muscle to improve the speed of smashes of great significance... |
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