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Task demand and load carriage experience affect gait variability among military cadets

Load carriage is an inevitable daily task for soldiers. The purposes of this study were to explore the extent to which gait variability (GV) is affected by load carriage and experience among military cadets, and whether experience-related differences in GV are dependent on task demand. Two groups of...

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Autores principales: Ulman, Sophia, Srinivasan, Divya, Nussbaum, Maury A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9626617/
https://www.ncbi.nlm.nih.gov/pubmed/36319838
http://dx.doi.org/10.1038/s41598-022-22881-y
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author Ulman, Sophia
Srinivasan, Divya
Nussbaum, Maury A.
author_facet Ulman, Sophia
Srinivasan, Divya
Nussbaum, Maury A.
author_sort Ulman, Sophia
collection PubMed
description Load carriage is an inevitable daily task for soldiers. The purposes of this study were to explore the extent to which gait variability (GV) is affected by load carriage and experience among military cadets, and whether experience-related differences in GV are dependent on task demand. Two groups of cadets (30 experienced, 30 less experienced) completed a load carriage task in each of three load conditions (no load, 16 kg, 32 kg). Three categories of GV measures were obtained: spatiotemporal variability, joint kinematic variability, and Lyapunov exponents. Compared to traditional mean gait measures, GV measures were more discriminative of experience: although both groups showed similar mean gait measures, the experienced participants had reduced variability in spatiotemporal measures (p ≤ 0.008) and joint kinematics (p ≤ 0.004), as well as lower levels of long-term local dynamic stability at the ankle (p = 0.040). In both groups, heavier loads were also caused increased GV (p ≤ 0.018) and enhanced short-term local dynamic stability at the knee (p = 0.014). These results emphasize the importance of GV measures, which may provide a more complete description of adaptability, stability, and control; highlight alternate movement strategies during more difficult load carriage; and capture experience-related differences in load carriage strategies.
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spelling pubmed-96266172022-11-03 Task demand and load carriage experience affect gait variability among military cadets Ulman, Sophia Srinivasan, Divya Nussbaum, Maury A. Sci Rep Article Load carriage is an inevitable daily task for soldiers. The purposes of this study were to explore the extent to which gait variability (GV) is affected by load carriage and experience among military cadets, and whether experience-related differences in GV are dependent on task demand. Two groups of cadets (30 experienced, 30 less experienced) completed a load carriage task in each of three load conditions (no load, 16 kg, 32 kg). Three categories of GV measures were obtained: spatiotemporal variability, joint kinematic variability, and Lyapunov exponents. Compared to traditional mean gait measures, GV measures were more discriminative of experience: although both groups showed similar mean gait measures, the experienced participants had reduced variability in spatiotemporal measures (p ≤ 0.008) and joint kinematics (p ≤ 0.004), as well as lower levels of long-term local dynamic stability at the ankle (p = 0.040). In both groups, heavier loads were also caused increased GV (p ≤ 0.018) and enhanced short-term local dynamic stability at the knee (p = 0.014). These results emphasize the importance of GV measures, which may provide a more complete description of adaptability, stability, and control; highlight alternate movement strategies during more difficult load carriage; and capture experience-related differences in load carriage strategies. Nature Publishing Group UK 2022-11-01 /pmc/articles/PMC9626617/ /pubmed/36319838 http://dx.doi.org/10.1038/s41598-022-22881-y Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Ulman, Sophia
Srinivasan, Divya
Nussbaum, Maury A.
Task demand and load carriage experience affect gait variability among military cadets
title Task demand and load carriage experience affect gait variability among military cadets
title_full Task demand and load carriage experience affect gait variability among military cadets
title_fullStr Task demand and load carriage experience affect gait variability among military cadets
title_full_unstemmed Task demand and load carriage experience affect gait variability among military cadets
title_short Task demand and load carriage experience affect gait variability among military cadets
title_sort task demand and load carriage experience affect gait variability among military cadets
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9626617/
https://www.ncbi.nlm.nih.gov/pubmed/36319838
http://dx.doi.org/10.1038/s41598-022-22881-y
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