For gait training, we used an electric Gait Trainer 2 treadmill (Biodex Medical System, NY, USA), with a walking area measuring 160 x 51 centimeters (cm), and equipped with a bar for upper extremity support, heart monitoring by bioimpedance sensors located on the bar and a Polar Telemetry system (POLAR, USA). Coupled to the treadmill is an Unweighing System (Biodex Medical System, NY, USA), composed of a vertical standing frame that carries the weight supported by means of a harness. However, the patients did not use the weight support system in this study and the harness was used only as a safety precaution during the training sessions.