Investigating Into The Characteristics Of Core Muscles SEMG In Fencing Lunge And Isokinetic Strength Of Fencers

PurposeCore strength training is adopted by the various sports， and studies focus onmethods of core strength training in fencing, less research about the core muscles ofspecial features of fencing. Therefore, this study combined with the activitycharacteristics of core muscles in a fencing lung and the characteristics of core strength,and found out the relationship between them, so provide a theoretical basis of sportstraining and rehabilitation training for the fencing.Methods10fencers from Jiangsu team of fencing were recruited for the test. Mega-6000surface EMG test system was used to record the kinetic data during the fencing lungetest and the isokinetic test of trunk flexion and extension at the speed of60°/s, andthe ISOMED2000was used to test the core strength. Finally，SPSS18.0software wasapplied to data statistical analysis.Results(1)In fencing ready posture, the RMS of rectus abdominis is the largest; the RMSof the left side of erector spinae, multifidus, and gluteus maximus is greater than theright (p <0.05);but the contribution rate of the rectus femoris is the largest.(2)In the attack and restore process of fencing lunge， the RMS and thecontribution rate of the rectus femoris was greatest; the RMS of core muscles hadbilateral differences (p <0.05); The left rectus femoris and the left gluteal muscle werethe first activated, the order of the homonymous muscles (except rectus abdominis) toactivate was first the left and then the right. (3)The relative peak torque (PT) of the right thigh was greater than the left（p<0.05）and the H/Q<0.6at the speed of60°/sec; no differences of relative PT onboth sides and the H/Q<0.7at the speed of300°/sec; Bilateral differences of theH/Q<10%.(4)At the speed of60°/sec and300°/sec, The relative PT of the left side ofhip Adductors and abductors were greater than the right side, bilateral differences ofrelative PT were greater than15%.(5)At the speed of60°/sec，the RMS of the right rectus abdominis was greaterthan the left, but the Erector spinae and multifidus were contrary to that.Conclusions(1)In fencing ready posture, the main activities core muscles were rectus abdominisand rectus femoris, and all core muscles were in a relatively relaxed state.(2)In the attack and restore process of fencing lunge，the force of the right rectusfemoris was maximum.(3) In the attack and restore process of fencing lunge，the order of the homonymousmuscles (except rectus abdominis) to activate was first the left and then the right.(4) In the attack and restore process of fencing lunge，there′s a high load ofLumbar muscle in process of fencing lunge,(5)Fencers′popliteal rope muscle strength was weak, the bilateral differences ofhip adductors and abductors strength were greater than15%, and bilateral differences ofrectus abdominis and multifidus muscle strength were significant.。(6)In the attack and restore process of fencing lunge， the activities ofhomonymous muscles were imbalanced, this may be related to the rectus femoris, hipabduction muscle, rectus abdominis and multifidus muscle strength imbalanced.