Document Detail

Isometric rate of force development, maximum voluntary contraction, and balance in women with and without joint hypermobility.
MedLine Citation:
PMID:  18975361     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To determine differences between hypermobile subjects and controls in terms of maximum strength, rate of force development, and balance. METHODS: We recruited 13 subjects with hypermobility and 18 controls. Rate of force development and maximal voluntary contraction (MVC) during single leg knee extension of the right knee were measured isometrically for each subject. Balance was tested twice on a force plate with 15-second single-leg stands on the right leg. Rate of force development (N/second) and MVC (N) were extracted from the force-time curve as maximal rate of force development (= limit Deltaforce/Deltatime) and the absolute maximal value, respectively. RESULTS: The hypermobile subjects showed a significantly higher value for rate of force development (15.2% higher; P = 0.038, P = 0.453, epsilon = 0.693) and rate of force development related to body weight (16.4% higher; P = 0.018, P = 0.601, epsilon = 0.834) than the controls. The groups did not differ significantly in MVC (P = 0.767, P = 0.136, epsilon = 0.065), and MVC related to body weight varied randomly between the groups (P = 0.921, P = 0.050, epsilon = 0.000). In balance testing, the mediolateral sway of the hypermobile subjects showed significantly higher values (11.6% higher; P = 0.034, P = 0.050, epsilon = 0.000) than that of controls, but there was no significant difference (4.9% difference; P = 0.953, P = 0.050, epsilon = 0.000) in anteroposterior sway between the 2 groups. CONCLUSION: Hypermobile women without acute symptoms or limitations in activities of daily life have a higher rate of force development in the knee extensors and a higher mediolateral sway than controls with normal joint mobility.
Christine Mebes; Astrid Amstutz; Gere Luder; Hans-Ruedi Ziswiler; Matthias Stettler; Peter M Villiger; Lorenz Radlinger
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Arthritis and rheumatism     Volume:  59     ISSN:  0004-3591     ISO Abbreviation:  Arthritis Rheum.     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-10     Completed Date:  2009-01-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370605     Medline TA:  Arthritis Rheum     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1665-9     Citation Subset:  AIM; IM    
University Hospital Bern, Bern, Switzerland.
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MeSH Terms
Activities of Daily Living
Case-Control Studies
Cross-Sectional Studies
Isometric Contraction / physiology*
Joint Instability / physiopathology*
Knee Joint / physiopathology
Muscle Contraction / physiology*
Muscle Strength / physiology
Pilot Projects
Postural Balance / physiology*
Prospective Studies

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

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