Figure 3 Schematic representation of the biomechanical model and joint convention. Legend: (1) basis of the fifth metatarsal phalange, (2) fibulas lateral malleolus, (3) femurs lateral epicondyles, (4) femurs great trochanter, (5) iliac crest, (6) humerus great tubercle, (7) humerus lateral epicondyles, (8) ulnar styloid process, and (9) basis of the fifth metacarpal phalange.