Research Of The Muscle Character In Techniques In Taking-off Process Of The Fosbury Flop

Sport training theory is an important part of competitive sports, which is applied to uncover the common laws of training, guide the specialised training and improve the scientific level based on the scientific training. Power quality is one of the critical factors that determine the sports grade, and also an essential element of sprots training. Scientific training methods have already become the core element of muscle strength training, thus attracting the attention from the academic and sports circles. The current research on the usual strength traing method, however, is mainly limited to the analysis and discussion of training plans, methods and loads. Rarely are there researches on the characteristics of muscle contraction in strength training.With the help of SIMI-motion video system and DASYlab 10.0 software, the research studied and analysed the Fosbury flop sportsmen's takeoff and buffering, as well as the muscle strength characteristics of pedal and the rules, which supplies the necessary foundations for practice. Based on the above discussion, we come to the conclusion that:1. For fosbury flop sportsmen, angle of the buffer range of Knee joint is larger than that of hip joint whose angle of the buffer range is larger than that of ankle joint. While the pedal extension range of ankle joint is larger than that of knee joint, and that of knee joint is larger than that of hip joint. Which means the changing curve of hip joint is quite gentle, the slop of changing curve of ankle joint is the largest.2. The sequence of musculature activation during the takeoff:tibialis anterior→biceps femoris→gastrocnemius→soleus→vastus medialis→vastus lateralis→rectus femoris. The sequence to end the discharge:tibialis anterior→soleus→vastus lateralis→vastus medialis→gastrocnemius→rectus femoris→biceps femoris. The length of duration time:tibialis anterior→soleus→vastus lateralis→vastus medialis→gastrocnemius→rectus femoris→biceps femoris.3. The percent of power during the buffering period, the order is:biceps femoris,vastus medialis,vastus lateralis,soleus,gastrocnemius,rectus femoris,tibialis anterior.4. The percent of power during the pedaling period:biceps femoris,vastus lateralis,vastus medialis,soleus,rectus femoris,soleus,tibialis anterior.5. At the moment of the peak appeared of biceps femoris,vastus lateralis,vastus lateralis, the maximum value of knee angular acceleration times appeared.Based on the study of myoelectricity, we get the conclusion that during the takeoff, the contribution of soleus and vastus lateralis is greater, while the myoelectricity of biceps femoris continues during the whole period of takeoff. As a result, the author suggest that during the following training, sportsmen should not only increase the strength training of agonistic muscle,but also must strengthen the training of Antagonist. More professional strength training are to be chosen to improve the training effects, and lay a solid foundation for better achievements.