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User-driven walking assistance: first experimental results using the MyoSuit.

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    The MyoSuit, a soft wearable robot for legs, allows unimpaired users to walk naturally. It also significantly improved walking speed for a patient with spinal cord injury, showing its potential for gait rehabilitation.

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    Area of Science:

    • Robotics
    • Biomechanics
    • Rehabilitation Engineering

    Background:

    • Rigid exoskeletons are common for paralysis but limit user movement.
    • Soft wearable robots offer an alternative, enabling active user participation.
    • The MyoSuit is a lightweight, lower-limb soft wearable robot.

    Purpose of the Study:

    • To assess the MyoSuit's effect on unimpaired walking kinematics.
    • To evaluate the MyoSuit's assistance for a patient with gait impairment.

    Main Methods:

    • 10 unimpaired participants walked on a treadmill with the MyoSuit in transparency mode.
    • Kinematic data (joint angles, step length, stance-to-stride ratio) were analyzed.
    • A case study evaluated the MyoSuit's impact on a spinal cord-injured participant's walking speed.

    Main Results:

    • The MyoSuit did not alter unimpaired walking kinematics (RMS joint angle difference < 1.6°).
    • Step length and stance-to-stride ratio remained unaffected in unimpaired users.
    • The MyoSuit increased the spinal cord-injured participant's 10-meter walk test speed from 0.36 to 0.52 m/s.

    Conclusions:

    • The MyoSuit enables user-driven, kinematically unaltered walking.
    • It provides effective assistance for gait rehabilitation.
    • This soft robotic system shows promise in bridging the gap between rigid exoskeletons and unassisted ambulation.