Modeling of human lower limb and technical analysis of athlete´s high leg lift

The appearance of human motion capture system enables the analysis of human motion. In this paper, the athlete´s high leg lift exercise is studied. The motion was sampled through NDI motion capture system, and the data was imported into Visual 3D software to establish a lower limb model and to execute the simulation and analysis. The high leg lift exercise is partitioned into 6 stages, and it is found that there is a difference of 20 degrees in the maximum knee flexion angle between the dominant and non-dominant limb. Simultaneously, a multi-rigid-body was build to carry out the dynamic analysis. The flight height is linear with the square of angular acceleration of the non-supporting leg, and the thrust force changes with the angular velocity of the non-supporting leg in a parabolic line law. In conclusion, the human motion analysis technology helps the athletes to make the exercise scientific and efficient.