title: Age-related changes in distance from center of mass to center of pressure during one-leg standing.
abstract: The purpose of this study was to clarify the age-related effects of distances from the center of pressure (COP) to the center of mass (COM) (COP-COM distances) during one-leg standing (OLS) task. Healthy old and young adults (n = 11 each) participated in this study. The authors divided the task into 3 phases (accelerated, decelerated, and steady) based on the relationship between COM and COP. COP-COM distances in the older group were significantly reduced during the accelerated phase, then significantly increased during the decelerated and steady phases. Furthermore, distances during these phases correlated inversely with OLS time. The authors conclude that OLS time is shortened by the larger braking response to COM shifts just after leg-lifting, and the production of larger inertial forces to maintain COM position during the OLS in older individuals.
authors.affiliation: a Graduate School of Health Sciences, Hokkaido University , Sapporo , Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Mani
authors.forename: Shih-Fen
authors.initials: SF
authors.lastname: Hsiao
authors.forename: Kenta
authors.initials: K
authors.lastname: Takeda
authors.forename: Naoya
authors.initials: N
authors.lastname: Hasegawa
authors.forename: Mitsuhisa
authors.initials: M
authors.lastname: Tozuka
authors.forename: Akiyo
authors.initials: A
authors.lastname: Tsuda
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Ohashi
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Suwahara
authors.forename: Kumiko
authors.initials: K
authors.lastname: Ito
authors.forename: Tadayoshi
authors.initials: T
authors.lastname: Asaka
mesh_terms: D000368:Aged; D000375:Aging / Q000502:physiology*; D001696:Biomechanical Phenomena / Q000502:physiology*; D006801:Humans; D007866:Leg / Q000502:physiology*; D008297:Male; D004856:Postural Balance / Q000502:physiology*; D055815:Young Adult
keywords: balance; center of mass; center of pressure; elderly