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Title: Differences in muscle coactivation during postural control between healthy older and young adults.
Authors: Nagai, Koutatsu
Yamada, Minoru
Uemura, Kazuki
Yamada, Yosuke
Ichihashi, Noriaki  kyouindb  KAKEN_id
Tsuboyama, Tadao  kyouindb  KAKEN_id
Author's alias: 永井, 宏達
Keywords: Coactivation
Electromyography
Older adults
Postural control
Issue Date: Nov-2011
Publisher: Elsevier Ireland Ltd.
Journal title: Archives of gerontology and geriatrics
Volume: 53
Issue: 3
Start page: 338
End page: 343
Abstract: The purpose of this study was to clarify the difference in muscle coactivation during postural control between older and young adults and to identify the characteristics of postural control strategies in older adults by investigating the relationship between muscle coactivation and postural control ability. Forty-six healthy older adults (82.0±7.5 years) and 34 healthy young adults (22.1±2.3 years) participated. The postural tasks selected consisted of static standing, functional reach, functional stability boundary and gait. Coactivation of the ankle joint was recorded during each task via electromyography (EMG). The older adults showed significantly higher coactivation than the young adults during the tasks of standing, functional reach, functional stability boundary (forward), and gait (p<0.01). Postural sway area (ρ=0.42, p<0.05) and functional reach distance (ρ=-0.52, p<0.05) significantly correlated with coactivation during the corresponding task in older adults, i.e., muscle coactivation was significantly higher in the elderly with low postural control ability than in the elderly with high balance ability. Increased muscle coactivation could be a necessary change to compensate for a deterioration in postural control accompanying healthy aging. Further research is needed to clarify in greater detail positive and negative effects of muscle coactivation on postural control.
Rights: © 2011 Elsevier Ireland Ltd.
この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。This is not the published version. Please cite only the published version.
URI: http://hdl.handle.net/2433/147242
DOI(Published Version): 10.1016/j.archger.2011.01.003
PubMed ID: 21310498
Appears in Collections:Journal Articles

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