The effect of a hybrid assistive limb<sup>®</sup> on sit-to-stand and standing patterns of stroke patients

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    • Kasai Rie
    • Department of Physical Therapy, International University of Health and Welfare: 4-3 Kozunomori, Narita City, Chiba 286-8686, Japan
    • Takeda Sunao
    • Waseda Research Institute for Science and Engineering, Japan


[Purpose] The Hybrid Assistive Limb<sup>®</sup> (HAL<sup>®</sup>) robot suit is a powered exoskeleton that can assist a user's lower limb movement. The purpose of this study was to assess the effectiveness of HAL<sup>®</sup> in stroke rehabilitation, focusing on the change of the sit-to-stand (STS) movement pattern and standing posture. [Subjects and Methods] Five stroke patients participated in this study. Single leg HAL<sup>®</sup> was attached to each subject's paretic lower limb. The subjects performed STS three times both with and without HAL<sup>®</sup> use. A tri-axial accelerometer was used to assess the STS movement pattern. Forward-tilt angle (FTA) and the time required for STS were measured with and without HAL<sup>®</sup> use. Surface electromyography (EMG) of STS and standing were recorded to assess the vastus medialis muscle activities of the paretic limb. [Results] The average FTA without HAL<sup>®</sup> use was 35° and it improved to 43° with HAL<sup>®</sup> use. The time required for STS was longer for all subjects with HAL<sup>®</sup> use (without HAL<sup>®</sup> use: 3.42 s, with HAL<sup>®</sup> use: 5.11 s). The integrated EMGs of HAL<sup>®</sup> use compared to those without HAL<sup>®</sup>, were 83.6% and 66.3% for STS and standing, respectively. [Conclusion] HAL<sup>®</sup> may be effective in improving STS and standing patterns of stroke patients.


  • Journal of Physical Therapy Science

    Journal of Physical Therapy Science 28(6), 1786-1790, 2016

    The Society of Physical Therapy Science


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