Kinetic Analysis Of The Ability Of Human Jump Of Sneakers With Different Thickness Of Soles

The kinetic parameters of the experiment were obtained by taking 8 male non sports major normal undergraduates wearing sports shoes with different soles as the subjects to make standing long jump(SJ)and counter movement jump(CMJ).VICON infrared three-dimensional motion analysis system,four AMTI force platform and two Basler high-speed cameras have been adopted in the experiment so as to collect kinetic parameters of samples during the take-off and landing process of standing long jumps and counter movement jump.Through making a kinetic analysis on the take-off and landing of standing long jump and as well two different kinds of counter movement jump,it hopes that can provide some data supports for the relationships between distinct thickness of soles and the ability of human jumping.Research results:(1)When making standing long jump in sports shoes with different thicknesses of soles,there is a significant difference between the thickness of 0cm and 3cm(P=0.037<0.05).The significant difference between the soles of 0cm and 2cm(P=0.019<0.05),the soles of 0cm and 3cm(P=0.000<0.05),the soles of 1cm and 2cm(P=0.030<0.05)and the soles of 1cm and 3cm(P=0.000<0.05)can be find in the results of the squat jump(SJ)with different soles’ thickness.Besides,the difference is also obviously significant between the soles of 0cm and 1cm(P=0.018<0.05),the soles of 0cm and 2cm(P=0.014<0.05),the soles of 0cm and 3cm(P=0.000<0.05),as well as the soles of 1cm and 3cm(P =0.020<0.05)when making in counter movement jump(CMJ).(2)When achieving the maximum value of force with different soles ’thicknesses in the take-off stage(the left foot),it has significant difference between0 cm and 3cm(P=0.022<0.05)on the X-axis and between 0cm and 2cm(P=0.005<0.05)on the Y-axis.The results also shows that significant difference hasnot only existed between the 0cm and 3cm(P=0.001<0.05),2cm and 3cm(P=0.011<0.05)on the X-axis,but also be presented between 0 cm and 1 cm(P=0.01<0.05),0 cm and 2 cm(P=0.00<0.05),0 cm and 3 cm(P=0.00<0.05)on the Y-axis when the maximum value of force is reached by wearing the sneakers with different soles’ thicknesses in the take-off stage(the right foot).(3)Among the different thickness of the sneaker soles,the thickness of 0cm is helpful to achieve the shortest time and the better effect in the stage of take-off and driving.(4)No significant difference in one-way ANOVA can be presented according to the results of joint force in the study.(5)The results of the experiment shows that the force of the knee joints is bigger than the hip joint,furthermore the force of the ankle joint is also bigger the force of the ankle joint.While in the landing stage in stand jumping and the take-off stage in counter movement jumping,the force of the knee joints is bigger than the ankle joint,moreover the force of the ankle joint is also bigger the force of the hip joint.The following conclusions can be drawn through the experiment:(1)In view of the results of standing long jump and the height of counter movement jump,as the thickness of the sole continually increases,the heights of SJ and CMJ decrease gradually.The thickness of the sole will affect the results of standing long jump and counter movement jump.(2)According to the maximum of force of SJ and CMJ,the thinner the sole of the sneaker is,the greater the maximum of force of thrusting against the ground can be in the take-off stage.The thickness of the soles will affect the maximum of force during the stage of thrusting against the ground in SJ and CMJ.(3)The effects of movement will be influenced by the time of thrusting against the ground.Athletes wearing the sneakers with the sole of 0cm take the shortest impulse time and obtain the better results.(4)There was no significant difference from the view of joint force.The thickness of soles will not affect the ground reaction force of the lower limb joints(5)During the buffering of SJ and CMJ,the knee-joints suffered the greatest ground reaction.As a result,knee-joints are at the greatest risk of being injured when doing jumping sports.