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Postural Control Follows a Bi-Phasic Alteration Pattern During Mountain Ultra-Marathon
It is well knows that postural control (PC) is deteriorated with neuromuscular fatigue, altitude or sleep deprivation induced by a mountain ultra-marathon (MUM). Several regulatory mechanisms have also been reported during this type of event and the changes in PC at different points of MUM remain un...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6346676/ https://www.ncbi.nlm.nih.gov/pubmed/30713506 http://dx.doi.org/10.3389/fphys.2018.01971 |
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author | Degache, Francis Serain, Emilie Vernillo, Gianluca Meyer, Frederic Falbriard, Mathieu Savoldelli, Aldo Guex, Kenny Millet, Grégoire P. |
author_facet | Degache, Francis Serain, Emilie Vernillo, Gianluca Meyer, Frederic Falbriard, Mathieu Savoldelli, Aldo Guex, Kenny Millet, Grégoire P. |
author_sort | Degache, Francis |
collection | PubMed |
description | It is well knows that postural control (PC) is deteriorated with neuromuscular fatigue, altitude or sleep deprivation induced by a mountain ultra-marathon (MUM). Several regulatory mechanisms have also been reported during this type of event and the changes in PC at different points of MUM remain unknown. The purpose of this study was to investigate the time course of PC during an extreme MUM. We tested the hypothesis that PC alteration would not increase linearly. Methods: 16 participants (age 45.1 ± 9.6 years) were tested bipedaly on a posturographic platform for 51.2 s with eyes open every ∼50 km. Both traditional and stabilogram diffusion analyses (SDA) were performed. A visual analog scale (VAS) was used for a subjective evaluation of global fatigue, sleep feeling and pain. Results: The main parameters (center of pressure trajectory analysis) increased significantly (p < 0.001, d = 1.56, very large) until km 100. This was confirmed by SDA in the antero-posterior plane. Short term effective diffusion coefficient significantly increased (p < 0.001, d = 1.07, very large) as critical point (p < 0.01, d = 1.57, very large). From km 100 to 200, a different response was observed with a continuous decrease in most of the PC parameters. This was confirmed by SDA in the antero-posterior plane. Short term effective diffusion coefficient significantly increased (p < 0.001, d = 1.39, very large) as critical point (p < 0.01, d = 1.51, very large). Conclusion: Posture alteration is progressively increased until 100 km. After this point, compensatory mechanisms appear to limit the posture degradation. This bi-phasic response is of interest for better understanding the coping with extreme fatigue. |
format | Online Article Text |
id | pubmed-6346676 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-63466762019-02-01 Postural Control Follows a Bi-Phasic Alteration Pattern During Mountain Ultra-Marathon Degache, Francis Serain, Emilie Vernillo, Gianluca Meyer, Frederic Falbriard, Mathieu Savoldelli, Aldo Guex, Kenny Millet, Grégoire P. Front Physiol Physiology It is well knows that postural control (PC) is deteriorated with neuromuscular fatigue, altitude or sleep deprivation induced by a mountain ultra-marathon (MUM). Several regulatory mechanisms have also been reported during this type of event and the changes in PC at different points of MUM remain unknown. The purpose of this study was to investigate the time course of PC during an extreme MUM. We tested the hypothesis that PC alteration would not increase linearly. Methods: 16 participants (age 45.1 ± 9.6 years) were tested bipedaly on a posturographic platform for 51.2 s with eyes open every ∼50 km. Both traditional and stabilogram diffusion analyses (SDA) were performed. A visual analog scale (VAS) was used for a subjective evaluation of global fatigue, sleep feeling and pain. Results: The main parameters (center of pressure trajectory analysis) increased significantly (p < 0.001, d = 1.56, very large) until km 100. This was confirmed by SDA in the antero-posterior plane. Short term effective diffusion coefficient significantly increased (p < 0.001, d = 1.07, very large) as critical point (p < 0.01, d = 1.57, very large). From km 100 to 200, a different response was observed with a continuous decrease in most of the PC parameters. This was confirmed by SDA in the antero-posterior plane. Short term effective diffusion coefficient significantly increased (p < 0.001, d = 1.39, very large) as critical point (p < 0.01, d = 1.51, very large). Conclusion: Posture alteration is progressively increased until 100 km. After this point, compensatory mechanisms appear to limit the posture degradation. This bi-phasic response is of interest for better understanding the coping with extreme fatigue. Frontiers Media S.A. 2019-01-17 /pmc/articles/PMC6346676/ /pubmed/30713506 http://dx.doi.org/10.3389/fphys.2018.01971 Text en Copyright © 2019 Degache, Serain, Vernillo, Meyer, Falbriard, Savoldelli, Guex and Millet. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Physiology Degache, Francis Serain, Emilie Vernillo, Gianluca Meyer, Frederic Falbriard, Mathieu Savoldelli, Aldo Guex, Kenny Millet, Grégoire P. Postural Control Follows a Bi-Phasic Alteration Pattern During Mountain Ultra-Marathon |
title | Postural Control Follows a Bi-Phasic Alteration Pattern During Mountain Ultra-Marathon |
title_full | Postural Control Follows a Bi-Phasic Alteration Pattern During Mountain Ultra-Marathon |
title_fullStr | Postural Control Follows a Bi-Phasic Alteration Pattern During Mountain Ultra-Marathon |
title_full_unstemmed | Postural Control Follows a Bi-Phasic Alteration Pattern During Mountain Ultra-Marathon |
title_short | Postural Control Follows a Bi-Phasic Alteration Pattern During Mountain Ultra-Marathon |
title_sort | postural control follows a bi-phasic alteration pattern during mountain ultra-marathon |
topic | Physiology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6346676/ https://www.ncbi.nlm.nih.gov/pubmed/30713506 http://dx.doi.org/10.3389/fphys.2018.01971 |
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