LOWER LIMB PROSTHESIS -- Importance of Increasing the Functionality of Lower Limb Prostheses -- Normalization of the Gait Characteristics as a Means to Increase a Prosthesis's Functionality -- Lower Limb Prosthesis as Biotechnical System -- BIOMECHANICS OF NORMAL GAIT AND CRITERIA OF THE ANTHROPOMORPHICITY OF PROSTHESIS -- Methods of Gait Analysis -- Ballistic Gait in Norm -- BALLISTIC GAIN ON PROSTHESIS -- Active and Passive Moments In Joints -- Model of the Step Cycle -- Compensatory Synergy During Gait on Prosthesis -- Modeling of One-Leg Balancing -- THEORY OF DESIGNING THE ANTHROPOMORPHIC LOWER LIMB PROSTHESES -- Synthesis of a Mechanism of Artificial Prosthetic Joint -- Development and Testing of the Prosthetic Ankle -- Development and Testing of the Prosthetic Knee Joint -- TESTING OF THE EXPERIMENTAL PROSTHESES -- Program -- Results -- Biomechanical Testing of the Rolling Foot with Adjustable Stiffness -- Monitoring -- PRINCIPLE OF SPECTRAL RECIPROCITY IN BIOMECHANICS OF LOCOMOTION AND REHABILITATION.