| Purpose:The purpose of the study is to take the lunge straight forward as the most basic technical action of the fencing athlete,and it is also the most used attacking step.For the fencing athletes,the kinematics and dynamics parameters of the hip,knee and ankle joints of the swinging leg are forwarded in a step forward.The support legs,the hip joint,the third joint,the speed of the sword,the speed of the center of gravity,and the elbow joint of the upper limb,The dynamic parameters of the wrist joints were analyzed using biological and biomechanical theories to explore the special characteristics and gender differences of the upper and lower extremity joints of the foil athletes.Methods: This paper selects the characteristics of 10(5 male and 5 female)excellent foil players from Shanghai Institute of Physical Education as the research object,and uses the high-speed camera and three-dimensional force measuring platform to conduct synchronous comprehensive testing methods for fencing.The athlete's kinematics and dynamics parameters of the hip,knee and ankle joints of the swinging leg,the support leg,the knee joint,the speed of the sword,the speed of the center of gravity,and the upper limb elbow joint and wrist joint.The kinetic indicator parameters were determined.An independent sample test was performed on the measured data using SPSS 20.0.Results:1)The fencing athlete first starts the hand when completing the straight forward stroke,then ends with the swinging,vacating and buffering of the swinging leg.Male and female fencing athletes have no significant difference in completing the forward stepping and straightening,which is in line with the rules and requirements of traditional fencing teaching.2)In kinematics: 1 range of angle change: knee joint > ankle joint > hip joint,swing leg > support leg,elbow joint > wrist joint,in line with the injury law of the fencing item ie knee joint > ankle joint > hip joint;2 center of gravity The trajectory is smoother and there is no obvious undulation;3 the center of gravity speed is consistent with the range of the angle of the knee joint of the swinging leg,and the range of the sword speed is consistent with the range of the elbow joint angle.3)Dynamics: 1 The average value of the second peak of the ground reaction force is 3.5BW and the maximum value is 5.3BW,which is the cause of the lower limb injury of the fencing athlete;2 The peak of the ground reaction force in the front and rear direction is not large,but the direction change is complicated.The range of angles of the three joints of the lower limbs is consistent;3 the magnitude of the flexion and extension moments: hip joint> knee joint> ankle joint,the hip joint torque value is the largest,and the corresponding load is relatively large.Conclusions:1)The foil is forwarded in a step forward.The upper limb is earlier than the lower limb;the forward step and the lunge are both swaying the knee joint as the axis,and the swinging leg drives the supporting leg;the contribution of the knee joint maximum.There is a significant correlation between the range of elbow joint angle values and the speed of the sword,which is an important indicator for predicting the speed of the sword.2)Male and female foil players in the forward step of the lunge,the female athletes in the buffer stage produce greater knee angle changes,increase the load of the knee anterior cruciate ligament,and finally increase the knee injury of female athletes.risk.3)Male and female foil players step forward in the straight step,the reaction force of the female athlete in the vertical direction and the front and rear direction is greater than that of the male athlete.The reason is that the female athlete increases the hip,knee and ankle joints for greater impulse.The result of the angle.By analyzing the torque,it is found that the power source of the forward stepping step is the hip joint and the knee extensor muscle group. |
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