Study On The Effect Of Electrical Muscle Stimulation Training On Lower Limb Explosiveness And Athletic Performance Of Basketball Players

Objective: To explore the influence of electrical muscle stimulation training on the effect of lower limb explosiveness training,in order to provide a safer and more efficient training method for lower limb explosiveness training,and to provide reference opinions for basketball players,enthusiasts and coaches to avoid sports injuries and scientific sports training programs.Methods: In this study,20 male basketball players were selected as the research subjects,divided into 10 people in the experimental group and 10 people in the control group,the experimental group underwent 4 weeks of electrical stimulation training,the control group underwent 4 weeks of bodyweight resistance training,and 8 Qualisys 3D infrared motion capture cameras,4 Kistler force tables,and Delsys Trigno 16-channel wireless surface EMG system were used to synchronously collect kinematic,dynamic,and surface EMG signals for three longitudinal jump,in-situ jump,30-meter run,etc)are tested.Result:After 4 weeks of intervention training,CMJA movement(1)Kinematics index:compared with before intervention,the flying height of the experimental group increased significantly(P<0.05).(2)Dynamic index: compared with before intervention,the peak torque of both sides of the hip,knee,and ankle joints in the experimental group was significantly increased(P<0.05),while the peak torque of both sides of the hip,knee,and right ankle joints in the control group was significantly increased(P<0.05);The peak power of both hip,knee,and ankle joints in the experimental group was significantly increased(P<0.05),while the peak power of both hip and knee joints in the control group was significantly increased(P<0.05);The ground vertical ground vertical ground reaction force,impulse,explosive power index,and maximum power of the experimental group were significantly increased(P<0.05),while the impulse and maximum power of the control group were significantly increased(P<0.05).Compared with the control group,the peak torque of the left ankle joint in the experimental group was significantly increased(P<0.05).(3)Surface electromyography index: Compared with before intervention,the activation degree of L-MG and R-MG in the control group was significantly reduced(P<0.05),while the activation degree of L-LG,L-MG,and R-MG in the experimental group was significantly increased(P<0.05).There was no significant difference in muscle contribution rate before and after intervention(P>0.05).After 4 weeks of intervention training,CMJ movement(1)Kinematics index:compared with before intervention,the flying height of the experimental group and the control group was significantly increased(P<0.05).(2)Dynamic index: compared with before intervention,the peak torque of the left ankle joint,right hip joint,and ankle joint in the experimental group were significantly increased(P<0.05),while the peak torque of the left hip joint and right knee joint in the control group was significantly increased(P<0.05);The peak power of the right ankle joint in the experimental group was significantly increased(P<0.05),while the peak power of both knee joints in the control group was significantly increased(P<0.05);The ground vertical ground reaction force,explosive force index,and maximum power of the experimental group were significantly increased(P<0.05),while the ground vertical ground reaction force of the control group was significantly increased(P<0.05).The lower limb stiffness of the experimental group was significantly higher than before training and higher than that of the control group(P<0.05).(3)Surface electromyography index: compared with before intervention,the activation level of L-LG muscle was significantly increased(P<0.05),and the contribution rate of R-LG muscle was significantly increased(P<0.05)compared to the control group.After 4 weeks of intervention training,DJ movement(1)Kinematics index: compared with before intervention,the flying time and height of the experimental group were significantly improved(P<0.05).(2)Dynamic index: compared with before intervention,the peak torque of the right ankle joint in the control group was significantly increased(P<0.05);The peak power of the right knee joint and the peak power of both ankle joints in the experimental group were significantly increased(P<0.05),while the peak power of both knee joints in the control group was significantly increased(P<0.05);The reaction strength index was significantly higher than before intervention training and higher than the control group(P<0.05).There was no significant difference in the peak collision force and peak pedal extension between the experimental group and the control group before and after intervention(P>0.05).(3)Surface electromyography index: compared with before intervention,the degree of L-LG muscle activation was significantly increased(P<0.05),and the contribution rate of L-LG muscle activation was significantly increased(P<0.05)compared to the control group.Changes in exercise performance index after 4 weeks of intervention training:compared with before intervention,the experimental group and control group showed a significant increase in vertical jump height(P<0.05).Conclusion:1.Electrical muscle stimulation training effectively increases the altitude of CMJA,CMJ and DJ.2.Electrical muscle stimulation training can significantly improve the peak torque and peak power of the ankle joint,indicating that the degree of electrical stimulation training on the ankle joint is greater than that of the hip and knee joints,suggesting that the ankle joint plays a greater role in this training method,mainly developing ankle muscle strength and explosiveness.3.Electrical muscle stimulation training can improve the number of VGRF,impulse,explosive force index and maximum power in the lower limb explosiveness index than the ordinary group,indicating that electrical stimulation training can effectively improve the lower limb explosiveness and reaction force.4.Electrical muscle stimulation training can effectively improve the muscle activity of the non-dominant side,improve the degree of muscle activation and the contribution rate of muscle activation on the non-dominant side.5.Electrical muscle stimulation training can effectively improve physical fitness index such as vertical jump in place and 30-meter sprint running,thereby improving sports performance.