Assist-as-Needed Robot-Aided Gait Training Improves Walking Function in Individuals Following Stroke

Area of Science:

• Neurorehabilitation
• Robotics in Physical Therapy
• Biomechanics

Background:

• Robot-aided gait training (RAGT) with an assist-as-needed paradigm promotes active patient participation.
• Previous studies show RAGT improves treadmill walking post-stroke.
• The transferability of RAGT effects to over-ground walking and long-term retention remain unclear.

Purpose of the Study:

• To investigate the effects of assist-as-needed RAGT on over-ground walking patterns in stroke survivors.
• To assess the long-term retention of these effects.

Main Methods:

• Nine stroke subjects underwent 15 sessions of RAGT with visual feedback.
• Training involved matching ankle position to a target template.
• Clinical evaluations and gait analyses were conducted pre-training, immediately post-training, and at 6-month follow-up.

Main Results:

• Significant improvements were observed in over-ground walking speed, Dynamic Gait Index, and Timed Up and Go.
• Enhanced knee flexion during swing and increased hip excursion were noted.
• These improvements showed notable long-term retention at the 6-month mark.

Conclusions:

• Assist-as-needed RAGT, incorporating visual feedback, is a promising approach for improving over-ground walking in stroke survivors.
• The training elicits both immediate and sustained functional gains in gait parameters.
• This method supports enhanced motor recovery and functional mobility post-stroke.