Fig. 1. Kinematic and kinetic recordings. (A) Experimental setup. Kinematic data were measured by monitoring markers on the gleno-humeral joint (GH), ilium (IL), greater trochanter (GT), lateral femur epicondyle (LE), lateral malleolus (LM), and fifth metatarso-phalangeal joint (VM). Trunk, pelvis, thigh, shank and foot are the limb segments identified by these markers. Elevation angles were computed relative to the vertical. Ground reaction forces were measured by force platforms along x,y,z axes. (B) Sagittal stick diagrams and (C) force platform measurements at two stages of early walking in the same child (subject G.M.): at 12.5 months (first independent steps), and at 17 months.