The document analyzes the biomechanics of two types of soccer kicks - the straight kick and sweep kick - using 3D motion capture. It finds that the hip flexors and extensors produce most of the kicking force, with hip extensors initiating knee extension just before ball contact. While the sweep kick involves substantial abduction/adduction forces, these contribute less to power than flexion/extension motions due to anatomical resistance of moments. The study supports previous findings and recommends further 3D kinetic analysis of soccer kicks.

1. 3D-Biomechanical Analysis of the Soccer Kick