Biomechanical Analysis Of The Effect Of Walking With Different Weight-loading Ways On Human Gait

Through kinematics and dynamics analysis,this study compares the effects of front and rear trunk loads on human gait,which is of great significance in expanding the choice of backpack modes,improving the efficiency of backpack loading and speeding up the design of backpack in the future.Fifteen ordinary college students were selected as the subjects of this study.The biomechanical parameters of gait were collected by three-dimensional image method and three-dimensional dynamometer under the conditions of no-load,front-load and back-load.The results showed that:1.When walking under different load modes,the support period of gait cycle increases significantly while the swing period decreases significantly,while the step length decreases significantly while the step width increases significantly and the step speed decreases correspondingly.2.On the lower limb joint angle,the hip joint angle flexion is smaller under the condition of front load,the knee joint flexion is relatively larger,the ankle toe flexion angle increases,and walking under the condition of back load.The biggest change is that knee joint flexion increases,the ankle toe flexion amplitude decreases significantly,and the foot valgus degree increases slightly;on the trunk angle,walking trunk backward under the condition of front load.Obviously,the forward inclination is obvious when walking under the back load condition,and the swing amplitude of the center of gravity in the left and right direction is also increased by increasing the foot deflection angle under the front load condition.3.Whether the front or the rear load conditions,the reaction force of vertical support increases significantly;the maximum braking force is higher under the front load conditions,while the maximum driving force is relatively low;and the maximum lateral force under the front load conditions increases significantly.CONCLUSION: Forward weight-bearing walking increases the fatigue of hip extensor and knee extensor muscles and the risk of injury of ankle joint,knee joint and plantar soft tissue compared with back weight-bearing and non-weight-bearing walking.