1. Purpose To determine whether body weight-supported treadmill training (BWSTT) has beneficial effects, over and above arm-cycle ergometry training (ACET), on arterial stiffness (aortic pulse wave velocity, aPWV) and secondary health outcomes (cardiovascular, autonomic and metabolic indices, fitness, body composition, and quality of life) in individuals with chronic (≥ 1 year post-injury) motor-complete cervical and high-thoracic SCI.