A traditional training modality for patients with limited mobility is body-weight supported treadmill training (BWSTT). Our preliminary results support the efficacy of BWSTT in progressive MS patients; however, the financial burden and labour-intensive nature of BWSTT does not make it a viable option for most settings. For the aforementioned reasons, we are proposing total body recumbent stepper training (TBRST) as an alternative therapy for progressive MS patients with mobility impairments. TBRST is advantageous over BWSTT in that it has low set-up and maintenance costs, is easily used by patients with limited mobility and requires minimal assistance to operate. TBRST has the potential to become part of conventional MS treatment programs and could easily be incorporated into home and community settings. The primary aim of this investigation is to establish safety and satisfaction with TBRST in progressive MS patients. Second, we plan to determine if TBRST is as effective as a BWSTT as a therapeutic modality.