Document Detail


Mechanical power during maximal treadmill walking and running in young and elderly men.
MedLine Citation:
PMID:  14985997     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study determined mechanical power during movements specific to maximal walking and running using a non-motorized treadmill in 38 elderly [69.4 (5.0) years] and 50 young [24.3 (3.4) years] men. The mean mechanical power over a period of time covering six steps, during which the belt velocity peaked and then kept almost plateau, was determined as a performance score in each of maximal walking (WP) and running (RP). In terms of the value relative to body mass, the relative difference between the two age groups was greater for RP (61.7%) than for WP (21.4%) or isometric knee extension (34.1%) and flexion torque (43.8%). In the two groups, WP was significantly ( P<0.05) correlated to knee extension (r=0.582 for the elderly and r=0.392 for the young) and flexion torque (r=0.524 for the elderly and r=0.574 for the young). Similarly, RP was also significantly (P<0.05) correlated to knee extension (r=0.627 for the elderly and r=0.478 for the young) and flexion torque (r=0.500 for the elderly and r=0.281 for the young). In these relationships, the WP adjusted statistically by thigh muscle torque was similar in the two age groups. However, the corresponding value for RP was significantly higher in the young than in the elderly. The findings here indicate that: (1) the difference between the young and elderly men in mechanical power is greater during maximal running than maximal walking, and (2) although the thigh muscle torque contributes to the power production during the two maximal exercise modes in the two age groups, the RP is greater in the young than in the elderly regardless of the difference in the thigh muscle torque.
Authors:
Toshio Yanagiya; Hiroaki Kanehisa; Masanobu Tachi; Shinya Kuno; Tetsuo Fukunaga
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Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't     Date:  2004-02-17
Journal Detail:
Title:  European journal of applied physiology     Volume:  92     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2004-05-28     Completed Date:  2004-12-21     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  33-8     Citation Subset:  IM    
Affiliation:
Department of Sports Sciences, School of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, 359-1192 Saitama, Japan. yanagiya.toshio@waseda.jp
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MeSH Terms
Descriptor/Qualifier:
Adult
Age Factors
Aged
Aged, 80 and over
Aging / physiology
Exercise Test
Humans
Isometric Contraction / physiology*
Knee Joint / physiology*
Male
Mechanics
Middle Aged
Muscle, Skeletal / physiology
Physical Endurance / physiology*
Physical Exertion / physiology*
Running / physiology*
Torque
Walking / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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