Mobility Training Using Exoskeletons for Functional Recovery After Stroke

The purpose of this study is to assess the safety and effectiveness of the Ekso robotic exoskeleton in persons affected by a severe stroke. * Primary Objectives: * To determine if a structured high-dosage exoskeleton training program (EXTP) results in clinically significant gains in walking recovery in individuals affected by severe stroke. * To determine whether timing of EXTP delivery (i.e., sub-acute vs. chronic) and severity (non-ambulators vs. limited house-hold ambulators) affects the improvement in gait speed and overall function following the EXTP training protocol. * To determine whether maintenance or further improvement in gait speed can be achieved by an intensive follow-up program of either a traditional rehabilitation program (TRP) or extended EXTP. * Secondary Objectives: * To determine the effect on functional walking endurance as assessed by the 6 minute walk test and 10 meter walk test, in high-dosage exoskeleton training program (EXTP) vs. traditional rehabilitation program (TRP) carried in an outpatient setting for post stroke individuals. * To determine the effect on functional balance, as assessed by the Berg Balance Scale, Functional Gait Assessment and Five times sit to stand measure as assessed by the 6 minute walk test, in high-dosage exoskeleton training program (EXTP) vs. traditional rehabilitation program (TRP) carried in an outpatient setting for post stroke individuals. * To determine the effect on stroke recovery, as assessed by the step counter of task specific training in high-dosage exoskeleton training program (EXTP) vs. traditional rehabilitation program (TRP) carried in an outpatient setting