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Asian Journal of Sports Medicine

Sports Medicine Research Center, TUMS

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https://doi.org/10.5812/asjsm.34549

Reliability of 1-Repetition Maximum Estimation for Upper and Lower Body Muscular Strength Measurement in Untrained Middle Aged Type 2 Diabetic Patients

Author(s):
Unaise Abdul-HameedUnaise Abdul-Hameed1,*, Prateek RangraPrateek Rangra2, Mohd. Yakub ShareefMohd. Yakub Shareef3, Mohd. Ejaz HussainMohd. Ejaz Hussain1
1Centre for Physiotherapy and Rehabilitation Sciences, Jamia Millia Islamia (A Central University), New Delhi, India
2Queen Margaret University, UK
3Ansari Health Centre, Jamia Millia Islamia (A Central University), New Delhi-25
Asian Journal of Sports Medicine:Vol. 3, issue 4; 267-273
Published online:Nov 30, 2012
Article type:Research Article
Received:Feb 20, 2012
Accepted:Jun 18, 2012
How to Cite:Abdul-Hameed U, Rangra P, Shareef MY, Hussain ME. Reliability of 1-Repetition Maximum Estimation for Upper and Lower Body Muscular Strength Measurement in Untrained Middle Aged Type 2 Diabetic Patients. Asian J Sports Med. 2012;3(4):34549. doi: https://doi.org/10.5812/asjsm.34549

Abstract

Purpose:

The 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.

Methods:

Twenty 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.

Results:

Test-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.

Conclusions:

The study findings suggest that estimation of 1-RM is reliable for upper and lower body muscular strength measurement in untrained middle aged T2D patients.

Keywords
Reliability
Prediction
Type 2 Diabetes
1-Repetition Maximum
Exercise

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