Document Detail

Reciprocal strength ratio in shoulder abduction/adduction in sports and daily living.
MedLine Citation:
PMID:  11581564     Owner:  NLM     Status:  MEDLINE    
PURPOSE: Functionally, the shoulder is considered a ball joint, whereby high mobility is attended by low stability. Therefore, muscular balance is decisive for stability. Altered strength ratios are frequently described as "muscular dysbalances" and considered one of the causes of shoulder pathologies, whereby objective quantification is difficult. METHODS: In order to quantify physiological muscle balance, the strength ratio of shoulder abduction/adduction (AB/AD) was determined in 166 untrained men (UM) concentrically at 60 degrees.s-1 (LIDO-Active). The influence on this norm of one-sided (25 high-performance (TPH), 18 leisure tennis players (TPL)) and two-sided athletic exercise (32 gymnasts (GY)), altered daily exercise (11 paraplegics with paralysis time < 4 months (PP), 11 paraplegics with paralysis time > 2 yr (PU)), and a combination of altered daily exercise and athletic activity (16 trained paraplegics (PT)) was examined (ANOVA, alpha = 0.05). RESULTS: Determination of the AB/AD quotient in UM was 0.82. Shoulder stress in sports led to a decrease in quotients compared with UM because of a relatively increased torque in AD (P < 0.01). At the beginning of a paraplegia, the quotient of AB/AD is elevated (P < 0.05). This altered ratio decreases with duration of paralysis (PU) and athletic activity (PT). CONCLUSION: With increased shoulder stress, the altered strength ratios reflect specific requirements of the performance attained. However, the importance of muscular dysbalances for the onset of shoulder complaints must be considered more important than their influence on athletic performance capacity.
F Mayer; D Axmann; T Horstmann; F Martini; J Fritz; H H Dickhuth
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  33     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2001 Oct 
Date Detail:
Created Date:  2001-10-02     Completed Date:  2001-12-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1765-9     Citation Subset:  IM; S    
Medical Clinic and Policlinic, Department of Sports Medicine, Eberhard-Karls-University of Tübingen, Tübingen, Germany.
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MeSH Terms
Activities of Daily Living*
Analysis of Variance
Muscle Contraction / physiology
Muscle, Skeletal / physiology*
Physical Education and Training / methods
Pilot Projects
Reproducibility of Results
Shoulder Joint / physiology*
Sports / physiology*

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

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