The Study On The Kinetic And SEMG Of Lower Limb Joints When Normal-Speed Walking With Burden On Foot

Objective: This study aimed to investigate the foot or ankle weights on both sides ofthe1.5kg to normal walking speed effect on lower extremity joint weight-bearing gait,study strategy, lower extremity kinematics, kinetics and lower limbs muscle dischargelevel changes, and to explore the internal meaning of energy consumption increase.Methods: Data of kinematics and dynamics of the system and KISTLER walkthrough Vicon motion capture3-D force platform acquired synchronously; surfaceEMG data using the Delsys EMG acquisition system.Results: After applying weight-bearing ankle supination, flexion angle, the angle ofknee joint rotation, knee joint external rotation angle, hip flexion angle peakdifference; ankle joint lateral force, the distal force, longitudinal force, knee jointdistal peak stress difference; lower extremity joint torque peak, valley load after all nosignificant change; weight-bearing knee input power increases significantly. Unit twobiceps value increased significantly in the single support phase RMS; rectus femoris,inner thigh muscle, anterior tibial muscle was significantly increased in the secondperiod of double support RMSConclusion: Weight-bearing walking the body will consume more energy, includingthe stock two myo consumed, in the single support phase, rectus femoris and vastusmedialis and anterior tibial muscle in second double support phase of energyconsumption; gait posture for external rotation ankle flexion, hip flexion increased,increasing force, ankle; two knee joint increased significantly. But it will not causedamage to the joints of the human body, visible foot weight-bearing fitness is safe andfeasible; knee joint input power increases, indicates that the knee extensor musclesduring weight-bearing after need to consume more energy to the successfulcompletion of swing leg movement.