Reliability of 1-repetition maximum estimation for upper and lower body muscular strength measurement in untrained middle aged type 2 diabetic patients.

Content Provider	Europe PMC
Author	Abdul-Hameed, Unaise Rangra, Prateek Shareef, Mohd. Yakub Hussain, Mohd. Ejaz
Copyright Year	2012
Abstract	PurposeThe 1-repetition maximum (1-RM) test is the gold standard test for evaluating maximal dynamic strength of groups of muscles. However, safety of actual 1-RM testing is questionable in clinical situations such as type 2 diabetes (T2D), where an estimated 1-RM test is preferred. It is unclear if acceptable test retest reliability exists for the estimated 1-RM test in middle aged T2D patients. This study examined the reliability of the estimated 1-RM strength test in untrained middle aged T2D subjects.MethodsTwenty five untrained diabetic males (n=19) and females (n=6) aged 40.7+0.4 years participated in the study. Participants undertook the first estimated 1-RM test for five exercises namely supine bench press, leg press, lateral pull, leg extension and seated biceps curls. A familiarisation session was provided three to five days before the first test. 1-RM was estimated for all participants by Brzycki 1-RM prediction equation. Another identical 1-RM estimation procedure occurred one week after first test. Intraclass correlation coefficients (ICC), paired t-test, standard error of measurement (SEM), Bland-Altman plots, and estimation of 95% CI were used to assess reliability.ResultsTest-retest reliability was excellent (ICC2,1=0.98-0.99) for all measurements with the highest for leg extension (ICC2,1=0.99). The SEM was lowest for lateral pull and leg extension exercises. Paired t-tests showed non-significant differences between the means of 2 sessions across three of five exercises.ConclusionsThe study findings suggest that estimation of 1-RM is reliable for upper and lower body muscular strength measurement in untrained middle aged T2D patients.
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ISSN	2008000X
Journal	Asian Journal of Sports Medicine [Asian J Sports Med]
Volume Number	3
PubMed Central reference number	PMC3525823
Issue Number	4
PubMed reference number	23342225
e-ISSN	20087209
DOI	10.5812/asjsm.34549
Language	English
Publisher	Tehran University of Medical Sciences
Publisher Date	2012-12-01
Access Restriction	Open
Rights License	This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly. © 2012 Sports Medicine Research Center, Tehran University of Medical Sciences
Subject Keyword	Reliability Prediction Type 2 Diabetes 1-Repetition Maximum Exercise
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Sports Science