NDLI: Ankle dorsiflexor strength relates to the ability to restore balance during a backward support surface translation.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Fujimoto, Masahiro Hsu, Wei-Li Woollacott, Marjorie H. Chou, Li-Shan
Description	Country affiliation: United States Author Affiliation: Fujimoto M ( Motion Analysis Laboratory, Department of Human Physiology, University of Oregon, Eugene, OR, 97403, USA.)
Abstract	Functional base of support (FBOS), the effective area for center of pressure (COP) movement, decreases with aging, which would reduce one's ability to restore balance during perturbed stance. We investigated the relationship between ankle muscle strength and FBOS as well as the threshold perturbation acceleration that required a heel-rise (HR) or step (STEP) to maintain balance. Standing posture of 16 young and 16 elderly adults was perturbed with a backward support surface translation with the speed ranging from 15 to 70 cm/s. Dorsiflexor (DF) strength was found to significantly correlate with FBOS measures and threshold acceleration for HR. Significant correlations were also found between FBOS measures and threshold accelerations for HR and STEP, except for the backward FBOS and threshold acceleration for STEP. Elderly subjects demonstrated significantly smaller DF strength and FBOS measures than young subjects, but no significant group difference was detected in plantarflexor (PF) strength. Most elderly subjects took a step once they raised their heels, while most young subjects were able to restore balance after heel-rise. These findings, taken together, imply that weakness in ankle dorsiflexors could limit the ability of elderly adults to restore balance while standing on their toes. FBOS measures and ankle dorsiflexor strength could be sensitive measures to detect individuals with declined balance control.
File Format	HTM / HTML
ISSN	09666362
e-ISSN	18792219
DOI	10.1016/j.gaitpost.2013.03.026
Journal	Gait & Posture
Issue Number	4
Volume Number	38
Language	English
Publisher	Elsevier
Publisher Date	2013-09-01
Publisher Place	Great Britain (UK)
Access Restriction	Open
Subject Keyword	Adaptation, Physiological Research Support, N.i.h., Extramural Discipline Orthopedics Pressure Leg Ankle Joint Aging Physiology Electromyography Muscle, Skeletal Muscle Strength Postural Balance
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Rehabilitation Biophysics Sports Science

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ANKLE DORSIFLEXOR STRENGTH RELATES TO THE ABILITY TO RESTORE BALANCE DURING A BACKWARD SUPPORT SURFACE TRANSLATION

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ANKLE DORSIFLEXOR STRENGTH RELATES TO THE ABILITY TO RESTORE BALANCE DURING A BACKWARD SUPPORT SURFACE TRANSLATION

The modulation of forward propulsion, vertical support, and center of pressure by the plantarflexors during human walking.

Motor adaptation during dorsiflexion-assisted walking with a powered orthosis.

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Ankle dorsiflexor strength relates to the ability to restore balance during a backward support surface translation.