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Age- and speed-related differences i...

Lowry, Kristin Ann.

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Age- and speed-related differences in walking smoothness.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Age- and speed-related differences in walking smoothness./
Author:	Lowry, Kristin Ann.
Description:	139 p.
Notes:	Source: Dissertation Abstracts International, Volume: 71-09, Section: B, page: 5423.
Contained By:	Dissertation Abstracts International71-09B.
Subject:	Health Sciences, Aging. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3418666
ISBN:	9781124171777

Age- and speed-related differences in walking smoothness.
Lowry, Kristin Ann.

Age- and speed-related differences in walking smoothness. - 139 p.

Source: Dissertation Abstracts International, Volume: 71-09, Section: B, page: 5423.

Thesis (Ph.D.)--Iowa State University, 2010.

Extensive literature documents age-related differences in spatiotemporal variables during gait. Recent efforts have focused on upper body control and balance during gait. Harmonic ratios, derived from trunk acceleration signals, measure smoothness of motion, and are an indication of dynamic balance during gait. Limited and conflicting information exists regarding the effect of walking speed on harmonic ratios, as well as age-related differences. This research extends previous literature by: (1) examining harmonic ratios across a range of self-selected speeds in young adults; (2) comparing harmonic ratios at preferred speed in young adults, healthy 60-year-olds, and healthy 80-year-olds; and (3) comparing harmonic ratios in all three age groups across a range of self-selected and paced speeds. In contrast to previous research, young adults and 60-year-olds had similar trunk smoothness during over ground walking at a preferred pace, but 80-year-olds exhibited reduced smoothness specifically in the anteroposterior direction. In contrast to previous research, clear optimization of trunk smoothness at preferred speed in young adults was not found; trunk smoothness was reduced at slower speeds, but was maintained at speeds faster than preferred. The two older groups showed this same pattern, although the 80-year-olds exhibited reduced anteroposterior and vertical smoothness across speeds. Together, these findings indicate that active healthy 80-year-olds exhibit changes in trunk control even during unobstructed walking at their preferred pace. But contrary to expectations, changes in speed did not differentially affect 80-year-olds, except at very fast walking speeds.

ISBN: 9781124171777Subjects--Topical Terms:

1669845
Health Sciences, Aging.

Age- and speed-related differences in walking smoothness.
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035 $a (UMI)AAI3418666
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100 1 $a Lowry, Kristin Ann. $3 1674510
245 1 0 $a Age- and speed-related differences in walking smoothness.
300 $a 139 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-09, Section: B, page: 5423.
500 $a Adviser: Ann L. Smiley-Oyen.
502 $a Thesis (Ph.D.)--Iowa State University, 2010.
520 $a Extensive literature documents age-related differences in spatiotemporal variables during gait. Recent efforts have focused on upper body control and balance during gait. Harmonic ratios, derived from trunk acceleration signals, measure smoothness of motion, and are an indication of dynamic balance during gait. Limited and conflicting information exists regarding the effect of walking speed on harmonic ratios, as well as age-related differences. This research extends previous literature by: (1) examining harmonic ratios across a range of self-selected speeds in young adults; (2) comparing harmonic ratios at preferred speed in young adults, healthy 60-year-olds, and healthy 80-year-olds; and (3) comparing harmonic ratios in all three age groups across a range of self-selected and paced speeds. In contrast to previous research, young adults and 60-year-olds had similar trunk smoothness during over ground walking at a preferred pace, but 80-year-olds exhibited reduced smoothness specifically in the anteroposterior direction. In contrast to previous research, clear optimization of trunk smoothness at preferred speed in young adults was not found; trunk smoothness was reduced at slower speeds, but was maintained at speeds faster than preferred. The two older groups showed this same pattern, although the 80-year-olds exhibited reduced anteroposterior and vertical smoothness across speeds. Together, these findings indicate that active healthy 80-year-olds exhibit changes in trunk control even during unobstructed walking at their preferred pace. But contrary to expectations, changes in speed did not differentially affect 80-year-olds, except at very fast walking speeds.
590 $a School code: 0097.
650 4 $a Health Sciences, Aging. $3 1669845
650 4 $a Health Sciences, Recreation. $3 1018003
690 $a 0493
690 $a 0575
710 2 $a Iowa State University. $b Kinesiology. $3 1023925
773 0 $t Dissertation Abstracts International $g 71-09B.
790 1 0 $a Smiley-Oyen, Ann L., $e advisor
790 1 0 $a Derrick, Timothy R. $e committee member
790 1 0 $a Thomas, Jerry R. $e committee member
790 1 0 $a Bonett, Douglas G. $e committee member
790 1 0 $a Martin, Peter $e committee member
790 $a 0097
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3418666