A Study on Lateralization of Lower Limbs in Sprinters During Single-leg Jump
Objective To investigate the difference of lower limbs of sprinters when jumping through obstacles of different heights.Meth-ods Using a three-dimensional motion capture system and force platform,synchronized data collection and analysis of the kinematics and dynamics of the lower limbs during the landing buffering phase of jumping over three different heights of obstacles were performed for the dominant and non-dominant legs of 20 sprinters.Results 1)The Angle of ankle joint and hip joint on both sides of lower limbs were significantly different at the moment of touchdown(p＜0.05).2)During the landing phase,significant differences(p＜0.05)were found in the range of motion of the hip joints on both sides,intemal/extemal displacement,medial-lateral and anterior-posterior dis-placement,as well as peak dorsiflexion torque and peak power of the ankle joint.Compared to a height of 45 cm,significant differ-ences(p＜0.05)were observed in ankle joint dorsiflexion/plantarflexion range of motion,COP anterior-posterior displacement,peak hip flexor torque,and vGRF at 15 cm height.3)The symmetry index of ground reaction force and average loading rate exceeded 10％.Conclusion When jumping with one leg,the dominant leg adopts the landing strategy of active cushioning,while the non-dominant leg is passive against the landing impact.There is laterality on both sides of lower limbs,so it is suggested to improve the stability and performance of non-dominant legs through unilateral training,and reduce the influence of asymmetry.
万方数据
维普
