Document Detail

Normative values of agonist-antagonist shoulder strength ratios of adults aged 20 to 78 years.
MedLine Citation:
PMID:  10527095     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To determine normative values for isometric flexion/extension, abduction/adduction, and external/internal rotation strength ratios about the shoulder and to determine if these ratios are affected by age or gender. STUDY DESIGN: A cross-sectional study of 120 healthy volunteers (60 men, 60 women) aged 20 to 78 years. SETTING: Orthopedic research laboratory. METHODS: Flexion and extension strengths were measured isometrically using a Cybex II dynamometer at arm flexion angles of 30 degrees, 60 degrees, and 90 degrees. Abduction and adduction strengths were measured at 30 degrees, 60 degrees, and 90 degrees abduction. Internal and external rotation strengths were measured (1) with the arm abducted 15 degrees and neutral external/internal rotation and (2) with the arm abducted 90 degrees and externally rotated 30 degrees above the transverse plane. OUTCOME MEASURES: Isometric strength ratios for flexion/extension, abduction/adduction, and external/internal rotation. RESULTS: No statistically significant differences in agonist/antagonist strength ratios were found between dominant and nondominant sides or between genders. Age was associated with changes in strength ratios for measurements taken with the arm flexed or abducted 90 degrees. Posture was found to affect strength ratios. CONCLUSIONS: These data can serve as a normative reference for clinical use.
R E Hughes; M E Johnson; S W O'Driscoll; K N An
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Archives of physical medicine and rehabilitation     Volume:  80     ISSN:  0003-9993     ISO Abbreviation:  Arch Phys Med Rehabil     Publication Date:  1999 Oct 
Date Detail:
Created Date:  1999-10-28     Completed Date:  1999-10-28     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  2985158R     Medline TA:  Arch Phys Med Rehabil     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1324-6     Citation Subset:  AIM; IM    
Biomechanics Laboratory, Division of Orthopedic Research, Mayo Clinic and Mayo Foundation, Rochester, MN 55905, USA.
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MeSH Terms
Age Factors
Cross-Sectional Studies
Functional Laterality / physiology
Isometric Contraction / physiology*
Middle Aged
Muscle Weakness / diagnosis,  etiology,  physiopathology
Posture / physiology
Range of Motion, Articular / physiology*
Reference Values
Reproducibility of Results
Sensitivity and Specificity
Sex Characteristics
Shoulder Joint / physiology*
Grant Support

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

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