Document Detail


Changes in muscle and joint elasticity following long-term strength training in old age.
MedLine Citation:
PMID:  16685553     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The current investigation was designed (1) to examine the effect of a 48-week strength training on musculotendinous (MT) and musculoarticular (MA) stiffness characteristics in older men and women; and (2) to evaluate the influence of gender on stiffness behaviour in response to such training. The training was performed twice per week and mainly consisted of three series of 10 repetitions of calf-rise at 75% of the 3-repetition maximum. Two methods were used to perform stiffness measurements during plantar flexion: (1) the use of quick-release movements, allowing the calculation of MT stiffness; (2) the application of sinusoidal perturbations to the joint, allowing the calculation of MA stiffness. In each case, stiffness was linearly related to torque, leading to the calculation of a normalized stiffness index (SI) as the slope of this stiffness-torque relationship: SI(MT) and SI(MA), respectively. Results showed a similar decrease in SI(MT) among older men (-27%, P < 0.05) and women (-29%, P < 0.05) following training. A decrease in SI(MA) was only observed among women (-11%, P < 0.05). The results suggest that (1) MT stiffness decreases following training in older individuals, counterbalancing the effect of ageing; and (2) older men and women respond differently to the same resistance-training stimulus in terms of MA stiffness. Gender-related differences in MA stiffness response may originate from passive MA elastic structures.
Authors:
Julien Ochala; Daniel Lambertz; Jacques Van Hoecke; Michel Pousson
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't     Date:  2006-05-10
Journal Detail:
Title:  European journal of applied physiology     Volume:  100     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2007 Jul 
Date Detail:
Created Date:  2007-06-27     Completed Date:  2007-10-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  491-8     Citation Subset:  IM    
Affiliation:
Equipe INSERM- ERM 207 Motricité-Plasticité, Faculté des Sciences du Sport, Université de Bourgogne, BP 27 877, 21 078 Dijon Cedex, France. Julien.Ochala@u-bourgogne.fr
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Physiological / physiology
Aged
Aged, 80 and over
Aging / physiology*
Ankle Joint / physiology*
Biomechanics
Elasticity
Exercise / physiology
Female
Humans
Isometric Contraction / physiology
Male
Muscle, Skeletal / physiology*
Physical Fitness / physiology*
Sex Factors
Tendons / physiology
Time Factors
Torque

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


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