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Whole body angular momentum characterizes reactive balance adaptations and perturbation intensity.

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Title: Whole body angular momentum characterizes reactive balance adaptations and perturbation intensity.
Authors: Adam, Mitchell D.1 (AUTHOR) Mitchell.adam@marquette.edu, McElvain, Delaney2 (AUTHOR) Delaney.mcelavain@marquette.edu, George Hornby, T.3 (AUTHOR) Tghornby@iu.edu, Hyngstrom, Allison S.1 (AUTHOR) Allison.hyngstrom@marquette.edu, Schmit, Brian D.2 (AUTHOR) Brian.schmit@marquette.edu
Source: Journal of Biomechanics. Jan2025, Vol. 179, pN.PAG-N.PAG. 1p.
Subjects: Angular momentum (Mechanics), Walking speed, Standard deviations
Abstract: Identifying measures which accurately quantify reactive balance adaptation during walking is essential to understand how emerging perturbation-based gait paradigms impact stability over the course of an intervention. These perturbation paradigms have shown promise in reducing falls for numerous clinical populations, however tracking progress in objective terms throughout an intervention remains challenging. Whole body angular momentum (H) may be particularly suited to detect subtle adaptations in the reactive balance response and is applicable within numerous perturbation environments. We assessed the ability of young healthy adults to adapt to varying intensities of discrete, unexpected, treadmill-based perturbations directed mediolaterally, anteriorly, and posteriorly during a single session while ambulating at their comfortable walking speed. We assessed corrective step length and width, trunk deviation and flexion, peak H over a stride, peak-to-peak differences in whole-body angular momentum over a stride (H R), and the participants ability to maintain their H trajectory within two standard deviations of their normal (PNT). Measures derived from H, particularly H R and PNT, demonstrated significant changes with increasing intensity and repetition. Corrective step length and width, trunk deviation and flexion, and peak H also demonstrated significant, but weaker, differences with increasing intensity and repetition. Derivatives of H are sensitive to changes in intensity and repetition, particularly when assessed as peak-to-peak differences and ability to maintain a normal trajectory over a stride. These measures may be utilized to detect changes in reactive balance during perturbation-based gait paradigms. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Biomechanics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
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Header DbId: egs
DbLabel: Engineering Source
An: 182071220
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Whole body angular momentum characterizes reactive balance adaptations and perturbation intensity.
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  Data: <searchLink fieldCode="AR" term="%22Adam%2C+Mitchell+D%2E%22">Adam, Mitchell D.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> Mitchell.adam@marquette.edu</i><br /><searchLink fieldCode="AR" term="%22McElvain%2C+Delaney%22">McElvain, Delaney</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> Delaney.mcelavain@marquette.edu</i><br /><searchLink fieldCode="AR" term="%22George+Hornby%2C+T%2E%22">George Hornby, T.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> Tghornby@iu.edu</i><br /><searchLink fieldCode="AR" term="%22Hyngstrom%2C+Allison+S%2E%22">Hyngstrom, Allison S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> Allison.hyngstrom@marquette.edu</i><br /><searchLink fieldCode="AR" term="%22Schmit%2C+Brian+D%2E%22">Schmit, Brian D.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> Brian.schmit@marquette.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Biomechanics%22">Journal of Biomechanics</searchLink>. Jan2025, Vol. 179, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Angular+momentum+%28Mechanics%29%22">Angular momentum (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Walking+speed%22">Walking speed</searchLink><br /><searchLink fieldCode="DE" term="%22Standard+deviations%22">Standard deviations</searchLink>
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  Data: Identifying measures which accurately quantify reactive balance adaptation during walking is essential to understand how emerging perturbation-based gait paradigms impact stability over the course of an intervention. These perturbation paradigms have shown promise in reducing falls for numerous clinical populations, however tracking progress in objective terms throughout an intervention remains challenging. Whole body angular momentum (H) may be particularly suited to detect subtle adaptations in the reactive balance response and is applicable within numerous perturbation environments. We assessed the ability of young healthy adults to adapt to varying intensities of discrete, unexpected, treadmill-based perturbations directed mediolaterally, anteriorly, and posteriorly during a single session while ambulating at their comfortable walking speed. We assessed corrective step length and width, trunk deviation and flexion, peak H over a stride, peak-to-peak differences in whole-body angular momentum over a stride (H R), and the participants ability to maintain their H trajectory within two standard deviations of their normal (PNT). Measures derived from H, particularly H R and PNT, demonstrated significant changes with increasing intensity and repetition. Corrective step length and width, trunk deviation and flexion, and peak H also demonstrated significant, but weaker, differences with increasing intensity and repetition. Derivatives of H are sensitive to changes in intensity and repetition, particularly when assessed as peak-to-peak differences and ability to maintain a normal trajectory over a stride. These measures may be utilized to detect changes in reactive balance during perturbation-based gait paradigms. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Biomechanics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.jbiomech.2024.112474
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      – Code: eng
        Text: English
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      – SubjectFull: Walking speed
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              Text: Jan2025
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