Deficits in the way to achieve balance related to mechanisms of dynamic stability control in the elderly

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Deficits in the way to achieve balance related to mechanisms of dynamic stability control in the elderly. / Arampatzis, Adamantios; Karamanidis, Kiros; Mademli, Lida.

in: Journal of biomechanics, Jahrgang 41, Nr. 8, 01.01.2008, S. 1754-1761.

Publikationen: Beitrag in FachzeitschriftZeitschriftenaufsätzeForschungBegutachtung

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@article{037b44ac8ba34e6783232cfbae133515,
title = "Deficits in the way to achieve balance related to mechanisms of dynamic stability control in the elderly",
abstract = "The purpose of this study was to examine the postural corrections related to components of dynamic stability aimed to increase our understanding of successful postural control among the elderly population. This was done by comparing balance behaviour of older adults who were able to recover stability (stable) and others who failed to regain stability (unstable) with a single step after a forward fall. Thirty-eight old male adults (64+/-3yr, 176+/-6cm, 78.5+/-7.8kg) had to recover balance after a sudden induced forward fall. All participants performed maximal isometric ankle plantarflexion and knee extension contractions on a dynamometer. The elongation of the gastrocnemius medialis and the vastus lateralis tendon and aponeuroses during isometric contraction was examined by ultrasonography. There were no differences in leg-extensor muscle strength or tendon stiffness between the two groups showing that the muscle tendon capacities may not be the reason for the observed differences in dynamic stability control. The unstable participants created a higher horizontal ground reaction push-off force of the support limb in the second part ( approximately 260ms after release) of the phase until touchdown leading to an unstable body position at touchdown. The results indicate deficits in the way to achieve balance related to mechanisms responsible for dynamic stability control within the elderly population.",
keywords = "Accidental Falls, Aged, Biomechanical Phenomena, Humans, Male, Middle Aged, Muscle Strength, Muscle, Skeletal, Postural Balance, Posture, Tendons",
author = "Adamantios Arampatzis and Kiros Karamanidis and Lida Mademli",
year = "2008",
month = jan,
day = "1",
doi = "10.1016/j.jbiomech.2008.02.022",
language = "English",
volume = "41",
pages = "1754--1761",
journal = "Journal of biomechanics",
issn = "0021-9290",
publisher = "Elsevier",
number = "8",

}

RIS

TY - JOUR

T1 - Deficits in the way to achieve balance related to mechanisms of dynamic stability control in the elderly

AU - Arampatzis, Adamantios

AU - Karamanidis, Kiros

AU - Mademli, Lida

PY - 2008/1/1

Y1 - 2008/1/1

N2 - The purpose of this study was to examine the postural corrections related to components of dynamic stability aimed to increase our understanding of successful postural control among the elderly population. This was done by comparing balance behaviour of older adults who were able to recover stability (stable) and others who failed to regain stability (unstable) with a single step after a forward fall. Thirty-eight old male adults (64+/-3yr, 176+/-6cm, 78.5+/-7.8kg) had to recover balance after a sudden induced forward fall. All participants performed maximal isometric ankle plantarflexion and knee extension contractions on a dynamometer. The elongation of the gastrocnemius medialis and the vastus lateralis tendon and aponeuroses during isometric contraction was examined by ultrasonography. There were no differences in leg-extensor muscle strength or tendon stiffness between the two groups showing that the muscle tendon capacities may not be the reason for the observed differences in dynamic stability control. The unstable participants created a higher horizontal ground reaction push-off force of the support limb in the second part ( approximately 260ms after release) of the phase until touchdown leading to an unstable body position at touchdown. The results indicate deficits in the way to achieve balance related to mechanisms responsible for dynamic stability control within the elderly population.

AB - The purpose of this study was to examine the postural corrections related to components of dynamic stability aimed to increase our understanding of successful postural control among the elderly population. This was done by comparing balance behaviour of older adults who were able to recover stability (stable) and others who failed to regain stability (unstable) with a single step after a forward fall. Thirty-eight old male adults (64+/-3yr, 176+/-6cm, 78.5+/-7.8kg) had to recover balance after a sudden induced forward fall. All participants performed maximal isometric ankle plantarflexion and knee extension contractions on a dynamometer. The elongation of the gastrocnemius medialis and the vastus lateralis tendon and aponeuroses during isometric contraction was examined by ultrasonography. There were no differences in leg-extensor muscle strength or tendon stiffness between the two groups showing that the muscle tendon capacities may not be the reason for the observed differences in dynamic stability control. The unstable participants created a higher horizontal ground reaction push-off force of the support limb in the second part ( approximately 260ms after release) of the phase until touchdown leading to an unstable body position at touchdown. The results indicate deficits in the way to achieve balance related to mechanisms responsible for dynamic stability control within the elderly population.

KW - Accidental Falls

KW - Aged

KW - Biomechanical Phenomena

KW - Humans

KW - Male

KW - Middle Aged

KW - Muscle Strength

KW - Muscle, Skeletal

KW - Postural Balance

KW - Posture

KW - Tendons

U2 - 10.1016/j.jbiomech.2008.02.022

DO - 10.1016/j.jbiomech.2008.02.022

M3 - Journal articles

C2 - 18395209

VL - 41

SP - 1754

EP - 1761

JO - Journal of biomechanics

JF - Journal of biomechanics

SN - 0021-9290

IS - 8

ER -

ID: 18671