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. 2021 Dec 1;21(23):8034. doi: 10.3390/s21238034

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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A representation of Virtual Reality Berg-Balance Scale ((VR-BBS) A,D) Narrow stance, the instructions read: Please stand with your feet together, following the footprints on the flow once you begin. Do not use the chair for support. ((task 4 in VR and task 7 in the standard BBS, see Table 1), B,E) Turning to look behind over left and right shoulder while standing. The instructions read: A target will appear behind you. Without moving your feet, turn to look directly at the target to the left until it disappears. Then repeat to the right. ((VR-BBS task 6 standard BBS task 10) and C,F) Reaching forward with outstretched arm while standing. The instructions read: Please reset your stance to normal. Then use one arm to slide the square as far forward as you can without taking a step. ((VR-BBS task 5 standard BBS task 9).