Figure 4.

Test 7 Drop Jump. Focus of the measurement: the mediolateral movement of the tibia head (blue curves). Upper diagram: 3D coordinates (x, y, z) of the tibia head marker measured by the video-MA. Lower diagram: acceleration (a_x, a_y, a_z) of the tibia head marker determined by double derivation of the coordinates. Events t_i are characteristic moments of the motion pattern such as forefoot or heel touch down. In the example shown, the tibia head shifts during landing between t₄ and t₆ (the foot lies flat on the ground) by 13 mm towards the medial.