| Reserch purposeThe purposes are to study on the difference of fencing movements and reasons behind,discuss the characteristics of using strength in fencing,find out the rules of techniques in fencing movement,so as to provide scientific theoretical basis for teaching and training.Reserch methodsUsing SPSS17 statistics software for the one-way analysis of variance on data,and then make comparison in pairs,and then have chi-square test on the contribution rate of muscle.Besides,the pearson's correlation analysis on the peak value of kinematics index and barycenter speed of hip,knee,and ankle of all subjects in bow step is made..Research Results1.The research results of kinematics and surface EMG of fencers:(1)There is no difference among the peak velocity and the dispacement of gravity center of fencers' thrust in bow stance in foil,epee,and sword,the three types of fencing.(2)In the thrust of bow stance,the range of hip movement of the foil fencer is significantly greater than that of the epee and sword fencers.(3)For foil fencer,the contribution of medial vastus muscle in bow stance thrust is the greatest and for epee and sword fencers,the gluteus maximus contributes most in the process.Moreover,the integrated EMG of sword fencer's gluteus maximus is significantly higher than that of foil fencers.2.The reasearch results of isokinetic muscle strength in the three types of fencing:(1)at the angular velocity of 60 ° /s,120 ° /s,and240 ° /s,there is no significant difference in hip joints on both sides of the three types of fencing.(2)When the knee is at the speed of 120°/s,the relative peak torque of the front leg flexor of foil fencer is significantly higher than that of the hing leg.However,there is no significant difference in the both sides of knee joint of epee and sword fencers.(3)As the knee joint angular velocity is at 60 ° /s,the relative peak torque of the sword fencer's both front and hind leg flexor is significantly higher than that of the foil fencer.(4)When the knee joint angular velocity is at 120°/s,the relative peak torque of the sword fencer's front leg flexor is higher than that of epee fencer.(5)As the ankle joint angular velocity is at 120°/s,the relative peak torque of the epee fencer's frontleg fletxor is higher than that of the hind leg.There is no significant difference between the two sides of the foil and sword fencers' legs and among different types of fencing.(6)The extension ratio of epee fencer's front hip joint is 0.8,close to the optimum value of 1.The front hip joint extension ratio of foil and sword fencers is relatively balanced.(7)The extension ratios of bilateral knee joints of all the three types of fencing players are more than the normal range.(8)The extension ratios of bilateral ankle joints of all the three types of fencing players are more than the normal range.Besides,the bilateral muscle strength is unbalanced.Research conclusions:(1)There is no difference in bow stance speed and the displacement of gravity center.The difference between the hind leg kinematics and the surface EMG in the process of thrust in bow step of different types of fencing is derived from the differences in the technical characteristics of various fencing types.(2)According to the surface EMG signal features,in bow stance thrust,the muscle that generates strength in sword fencer's hind leg pedal and stretch is medial vastus muscle and that of the sword and epee fencers is gluteus maximus muscle.It is the streching of hind leg knee joint that help the foil fencer to complete the action of bow stance.For sword and epee fencers,the stretching of their hind leg hip joint contributes to their finishing of bow stance.All these show that foil fencers needs to enhance their traning of hind leg medial muscle of the rectus abdominis muscle while sword and epee forcers should strengthen their hind leg gluteus maximus muscle in traning.(3)There is a significant correlation between the peak angular velocity of foil fencers' hind leg knee joint is significantly correlated with the range of their knee joint movement,suggesting that the improvement of the explosive force of foil fencers' hind leg quadriceps femoris muscle will increase their bow stance speed.(4)The fencers of all the types of fencing have different degrees of asymmetry in isokinetic muscle strength on both sides of their lower limb joints.And there is a difference in peak torques of the isokinetic muscle strength among the fencing types.This further proves that the bilateral lower limbs perform differently in specific techniques.However,whether it is necessary to apply differentitated training methods and means to strengthen them is to be studied in future. |
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