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

Autor: Adam MD; Marquette University Department of Physical Therapy, Schroeder Complex, 346. 560 N. 16(th) St., Milwaukee, WI 53233, USA. Electronic address: Mitchell.adam@marquette.edu., McElvain D; Marquette University Department of Biomedical Engineering, Engineering Hall, 344. 1637 W Wisconsin Ave, Milwaukee, WI 53233, USA. Electronic address: Delaney.mcelavain@marquette.edu., George Hornby T; Indiana University Department of Physical Medicine and Rehabilitation, Goodman Hall, Suite 4300, 355 West 16th Street, Indianapolis, IN 46202, USA. Electronic address: Tghornby@iu.edu., Hyngstrom AS; Marquette University Department of Physical Therapy, Schroeder Complex, 346. 560 N. 16(th) St., Milwaukee, WI 53233, USA. Electronic address: Allison.hyngstrom@marquette.edu., Schmit BD; Marquette University Department of Biomedical Engineering, Engineering Hall, 344. 1637 W Wisconsin Ave, Milwaukee, WI 53233, USA. Electronic address: Brian.schmit@marquette.edu.
Jazyk: angličtina
Zdroj: Journal of biomechanics [J Biomech] 2024 Dec 06; Vol. 179, pp. 112474. Date of Electronic Publication: 2024 Dec 06.
DOI: 10.1016/j.jbiomech.2024.112474
Abstrakt: 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.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: