Document Detail

Intrarater reliability of 1 repetition maximum estimation in determining shoulder internal rotation muscle strength performance.
MedLine Citation:
PMID:  15705029     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to determine intrarater reliability of the 1 repetition maximum (1RM) estimation for shoulder internal rotation. The accuracy of the estimated 1RM was determined by establishing the actual 1RM. Fifteen subjects were positioned supine with the shoulder in 0 degrees abduction (position 1) and prone with the shoulder in 90 degrees abduction (position 2). Subjects were placed in both testing positions and performed resisted shoulder internal rotation. A 1RM estimation equation was used to estimate shoulder internal rotation strength. After 1 week, procedures were repeated and intrarater reliability was calculated. One week after 1RM estimation procedures were completed, the accuracy of an estimated 1RM was determined by establishing an actual 1RM. The results indicated excellent intrarater reliability for position 1 (intraclass correlation coefficient [ICC] = 0.99) and position 2 (ICC = 0.96). The correlation coefficients for accuracy indicated excellent concurrent validation was attained for position 1 (ICC = 0.99) and position 2 (ICC = 0.97). Shoulder internal rotation 1RM estimation appears to be reliable and accurate. Clinicians may use submaximal loads to estimate the 1RM and decrease the possibility of injury during actual 1RM strength testing.
J David Taylor; William D Bandy
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  19     ISSN:  1064-8011     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2005 Feb 
Date Detail:
Created Date:  2005-02-11     Completed Date:  2005-06-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  163-8     Citation Subset:  IM; S    
Department of Physical Therapy, University of Central Arkansas, Conway, Arkansas 72035, USA.
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MeSH Terms
Muscle, Skeletal / physiology*
Range of Motion, Articular / physiology*
Reproducibility of Results
Shoulder Joint / physiology*
Supine Position / physiology
Weight-Bearing / physiology*

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

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