Biomechanical Analysis Of The Left Lower In Man’s Tennis Serving Technique

Object:In this study, combined with of surface electromyography technology and high-speed camera technology, the combination of the introduction of a tennis serve left lower limb in the whole process of the tennis, and combined with the movement anatomy, biomechanics, exercise physiology, exercise training and more disciplinary theoretical and practical knowledge to explain the the tennis serve lower extremity muscle force from a new angle, to improve teaching and athletes muscle strength training to provide a reasonable scientific theory, and thus long-term training for athletes muscle strain improvement.Method:In this study, the use of literature through the sort of related papers, literature and books, and make it as a theoretical basis; expert interviews to understand the actions of the measured muscle in select; combined with noraxon surface electromyography tester described taking into account the subjects tennis ball left lower limb muscle discharge and high-speed video camera, the analysis of the measured data and the use of appropriate analysis software SPSS17.0statistical software; final processing of the data obtained.Conclusions:1. two footsteps modes knee and hip in the buffer stage stage and kicking on the time required do not exist significant difference (P>0.05), its joint angle for maximum cushioning and maximum tread extension the angle does not exist a significant difference (P>0.05).2in hip buffer magnitude and step serve and step-by-step tee exist significant difference (P<0.05) in the knee buffer magnitude in two the footsteps ways not exist significant differences P>0.05. In kicking variations joint angle, knee and hip joints do not exist significant difference (P>0.05) in both the pace of the way.3.the buffer stage two tee footsteps of its start discharge order was the same; there are some differences in the the hurdle stage end of the order of discharge time; basically the same two footsteps way its in discharge duration above buffer stage continuous discharge time order, both hurdle stage footsteps of its continued discharge time order, there is a certain distinction; muscle in the landing phase of the discharge time and the end there are some differences on the order of discharge time.4.in the buffer stage tibialis anterior muscle, vastus lateralis and vastus medialis is the main force of muscle; major force in the the kicking stage vastus lateralis, vastus medialis and rectus femoris muscle; landing stage muscle in the difference is not great, and the minimum are shares rectus and tibial anterior muscle force, and step-serve semitendinosus and vastus medialis muscle force more shares outside, in the step-by-step tee side muscle and vastus medialis force more.5.in the muscle contribution rate, buffer stage and step-serve in the tibialis anterior muscle greatest contribution, step-by-step Serve the vastus medialis contribution rate; hurdle stage two footsteps are the vastus medialis muscle and The vastus lateralis contribution; landing stage and step-serve the largest the semitendinosus contribution rate in Step serve in the vastus lateralis muscle the greatest contribution.