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A novel prophylactic Chinese parachute ankle brace
BACKGROUND: The objective is to compare the effects of a self-designed and self-manufactured novel prophylactic ankle brace [Chinese parachute ankle brace (CPAB)] and two ordinary ankle braces on the ankle joint during a half-squat parachute landing (HSPL) via biomechanical assessment. METHODS: Twen...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
AME Publishing Company
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7944281/ https://www.ncbi.nlm.nih.gov/pubmed/33708945 http://dx.doi.org/10.21037/atm-20-4937 |
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author | Zhou, Xi Wu, Di Wu, Xiangdong Li, Zhengyao Yan, Bin Liang, Leilei He, Yu Liu, Yong |
author_facet | Zhou, Xi Wu, Di Wu, Xiangdong Li, Zhengyao Yan, Bin Liang, Leilei He, Yu Liu, Yong |
author_sort | Zhou, Xi |
collection | PubMed |
description | BACKGROUND: The objective is to compare the effects of a self-designed and self-manufactured novel prophylactic ankle brace [Chinese parachute ankle brace (CPAB)] and two ordinary ankle braces on the ankle joint during a half-squat parachute landing (HSPL) via biomechanical assessment. METHODS: Twenty elite paratroopers were in four different conditions: no brace, elastic brace, semi-rigid brace, and CPAB. Each participant was instructed to jump off a platform with three different heights, 40, 80, and 120 cm, and land on the force plate in a half-squat posture. The vertical ground reaction forces (vGRFs), joint angles, moments, powers, and works were calculated. After the experiment, every participant completed the questionnaires designed for this study. RESULTS: Increasing the dropping height increased all of the parameters significantly (P<0.01), except for time to peak vGRF (T-PvGRF). Applying three braces can all slightly increase vGRF (P=0.237) and reduce T-PvGRF by 6–10 ms, as well as decrease the joint angles, velocities, and moments on the sagittal and coronal planes. Wearing CPAB and a semi-rigid brace more efficiently restricted dorsiflexion and inversion (P<0.05), and they both significantly reduced ankle work (t=5.107, P<0.01; t=3.331, P<0.01) and peak power (t=7.237, P<0.01; t=6.711, P<0.01) at 120 cm. The total scores from low-to-high were semi-rigid brace (19.20±2.99), elastic brace (21.91±3.25), and CPAB (23.37±3.08). CONCLUSIONS: The CPAB was more effective at restricting ankle joint motion on the coronal and sagittal planes than the other two prophylactic ankle braces. Therefore, the CPAB had the advantages of a novel appearance, high efficiency, and superior comfort, providing a reliable choice for parachute jumping and training in China. |
format | Online Article Text |
id | pubmed-7944281 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | AME Publishing Company |
record_format | MEDLINE/PubMed |
spelling | pubmed-79442812021-03-10 A novel prophylactic Chinese parachute ankle brace Zhou, Xi Wu, Di Wu, Xiangdong Li, Zhengyao Yan, Bin Liang, Leilei He, Yu Liu, Yong Ann Transl Med Original Article BACKGROUND: The objective is to compare the effects of a self-designed and self-manufactured novel prophylactic ankle brace [Chinese parachute ankle brace (CPAB)] and two ordinary ankle braces on the ankle joint during a half-squat parachute landing (HSPL) via biomechanical assessment. METHODS: Twenty elite paratroopers were in four different conditions: no brace, elastic brace, semi-rigid brace, and CPAB. Each participant was instructed to jump off a platform with three different heights, 40, 80, and 120 cm, and land on the force plate in a half-squat posture. The vertical ground reaction forces (vGRFs), joint angles, moments, powers, and works were calculated. After the experiment, every participant completed the questionnaires designed for this study. RESULTS: Increasing the dropping height increased all of the parameters significantly (P<0.01), except for time to peak vGRF (T-PvGRF). Applying three braces can all slightly increase vGRF (P=0.237) and reduce T-PvGRF by 6–10 ms, as well as decrease the joint angles, velocities, and moments on the sagittal and coronal planes. Wearing CPAB and a semi-rigid brace more efficiently restricted dorsiflexion and inversion (P<0.05), and they both significantly reduced ankle work (t=5.107, P<0.01; t=3.331, P<0.01) and peak power (t=7.237, P<0.01; t=6.711, P<0.01) at 120 cm. The total scores from low-to-high were semi-rigid brace (19.20±2.99), elastic brace (21.91±3.25), and CPAB (23.37±3.08). CONCLUSIONS: The CPAB was more effective at restricting ankle joint motion on the coronal and sagittal planes than the other two prophylactic ankle braces. Therefore, the CPAB had the advantages of a novel appearance, high efficiency, and superior comfort, providing a reliable choice for parachute jumping and training in China. AME Publishing Company 2021-02 /pmc/articles/PMC7944281/ /pubmed/33708945 http://dx.doi.org/10.21037/atm-20-4937 Text en 2021 Annals of Translational Medicine. All rights reserved. https://creativecommons.org/licenses/by-nc-nd/4.0/Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0 (https://creativecommons.org/licenses/by-nc-nd/4.0/) . |
spellingShingle | Original Article Zhou, Xi Wu, Di Wu, Xiangdong Li, Zhengyao Yan, Bin Liang, Leilei He, Yu Liu, Yong A novel prophylactic Chinese parachute ankle brace |
title | A novel prophylactic Chinese parachute ankle brace |
title_full | A novel prophylactic Chinese parachute ankle brace |
title_fullStr | A novel prophylactic Chinese parachute ankle brace |
title_full_unstemmed | A novel prophylactic Chinese parachute ankle brace |
title_short | A novel prophylactic Chinese parachute ankle brace |
title_sort | novel prophylactic chinese parachute ankle brace |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7944281/ https://www.ncbi.nlm.nih.gov/pubmed/33708945 http://dx.doi.org/10.21037/atm-20-4937 |
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