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Biomechanical gait alterations independent of speed in the healthy elderly: evidence for specific limiting impairments

Kerrigan, D. Casey and Todd, Mary K. and Della Croce, Ugo and Lipsitz, Lewis A. and Collins, James J. (1998) Biomechanical gait alterations independent of speed in the healthy elderly: evidence for specific limiting impairments. Archives of Physical Medicine and Rehabilitation, Vol. 79 (3), p. 317-322. eISSN 1532-821X. Article.

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DOI: 10.1016/S0003-9993(98)90013-2

Abstract

Objectives: It is not known whether changes in the biomechanics of elderly gait are related to aging per se, or to reduced walking speed in this population. The goals of the present study were to identify specific biomechanical changes, independent of speed, that might impair gait performance in healthy older people by identifying age-associated changes in the biomechanics of gait, and to determine which of these changes persist at increased walking speed.
Design: Stereophotogrammetric and force platform data were collected, Differences in peak joint motion (kinematic) and joint moment and power (kinetic) values between healthy young and elderly subjects at comfortable and increased walking speed were measured.
Setting: A gait laboratory.
Subjects: Thirty-one healthy elderly (age 65 to 84 years) and 31 healthy young adult subjects (age 18 to 36 years), all without known neurologic, musculoskeletal, cardiac, or pulmonary problems.
Main Outcome Measures: All major peak kinematic and kinetic variables during the gait cycle.
Results: Several kinematic and kinetic differences between young and elderly adults were found that did not persist when walking speed was increased. Differences that persisted at both comfortable and fast walking speeds were reduced peak hip extension, increased anterior pelvic tilt, and reduced ankle plantarflexion and ankle power generation.
Conclusion: Gait performance in the elderly may be limited by both subtle hip flexion contracture and ankle plantarflexor concentric weakness. Results of the current study should motivate future experimental trials of specific hip flexor stretching and ankle plantarflexor concentric strengthening exercises to preserve and potentially improve walking performance in the elderly.

Item Type:Article
ID Code:6968
Status:Published
Refereed:Yes
Uncontrolled Keywords:Biomechanics, kinetic differences, elderly
Subjects:Area 09 - Ingegneria industriale e dell'informazione > ING-INF/06 Bioingegneria elettronica e informatica
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze biomediche
Publisher:Elsevier / W.B. Saunders
eISSN:1532-821X
Copyright Holders:© 1998 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation
Deposited On:16 Jan 2012 10:41

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