Experimental study on the half-squat parachute landing for driving and validating the inverse dynamic simulation

Objective To provide data for establishing,driving and validating the inverse dynamics model of Any-Body Modeling System,the simulated half-squat parachute landing experiment was designed and relevant data were collected. Method The subject was required to jump from a 0. 32 m high platform to simulate the half-squat parachute landing. The kinematic parameter of lower extremity joint,the ground reaction force and the surface electromyogram (SEMG) of four main muscles in the lower extremity joint were measured simultaneously. Results The angle changes of hip,knee and ankle along with time in three anatomical planes,the ground reaction force of right foot and the trajectory of the center of pressure were collected within 1 second just before and after the subject landing. These data would be used to drive the muscleskeletal model,while the data for measuring electromyogram activity would be used to validate the model. Conclusions The experiment meets the requirement of muscleskeletal model analysis,which can be used for further study of half-squat parachute landing.