Lower Extremity Movement Characteristics Of Curve Running

Purpose: The purpose of this study was to explore the differences of the three-dimensional joint kinematics and loading of lower limbes between linear and curve running.In order to provide recommendations for runners.Methods: Using a portable speed measuring system(Newtest,Powertimer,Finland)monitore the running speed(4±0.2m/s).A three-dimensional motion analysis system(Motion Analysis Raptor-4,USA,200Hz)and two force plates(Kistler,9281 CA,Switzerland,1000 Hz)was conducted to compare the kinematics and kinetics of lower extremity during the stance phases of linear and curve run(radius: 36m)of thirteen male particpants.Resuls: The left knee external rotation angle and left ankle plantar flexion angle increased at curve running initial contact.During curve running stance phase the maxmium value of right hip adduction angle,flexion angle,abduction moment and intorsion moment were higher.In the support phase,right knee abduction angular and loading of patellofemoral joint were higher,meanwhile right ankle plantar moment were lower.Conclusion: 1.In this study,we obtained the kinematics and dynamics characteristics of lower limbs during curve running.It was found that the angular momentum and the patellofemoral joint pressure of the right knee were significant increased during curve running.The results suggested that the risk of right patellar joint injury could be increased by the curve running.2.During curve running,the tension generated at the Achilles tendon remanined constant compared to linear running.