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About

Yoshiyuki Sankai is a pioneering figure in robotic rehabilitation and assistive technology, best known as the inventor of the Hybrid Assistive Limb (HAL) exoskeleton. His research centers on the intersection of human biomechanics, neuromuscular control, and wearable robotics, with a primary goal of restoring mobility to individuals with paralysis or severe motor impairment. Sankai’s major contributions include the development of the HAL suit, a robotic exoskeleton that detects bioelectric signals from the wearer’s muscles to provide real-time motion support. His seminal work, such as the 2014 study on gait training with HAL for a man with incomplete spinal cord injury, demonstrated clinically meaningful improvements—walking speed increased from 0.46 to 0.76 m/s and step length from 32 to 50 cm after just five sessions. This work, along with studies on polio survivors and wrist fracture rehabilitation, has laid the groundwork for robotic therapy in both neurological and orthopaedic contexts. While his citation counts remain modest, Sankai’s influence is profound: HAL is one of the world’s first commercially available medical exoskeletons, and his research continues to shape the future of human-robot interaction in rehabilitation.