Isokinetics and Exercise Science - Volume 23, issue 4
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Isokinetics and Exercise Science (IES) is an international journal devoted to the study of theoretical and applied aspects of human muscle performance. Since isokinetic dynamometry constitutes the major tool in this area, the journal takes a particular interest in exploring the considerable potential of this technology.
Isokinetics and Exercise Science publishes studies associated with the methodology of muscle performance especially with respect to the issues of reproducibility and validity of testing, description of normal and pathological mechanical parameters which are derivable from muscle testing, applications in basic research topics such as motor learning paradigms and electromyography. The journal also publishes studies on applications in clinical settings and technical aspects of the various measurement systems employed in human muscle performance research.
Isokinetics and Exercise Science welcomes submissions in the form of research papers, reviews, case studies and technical reports from professionals in the fields of sports medicine, orthopaedic and neurological rehabilitation and exercise physiology.
Abstract: BACKGROUND AND OBJECTIVE: Multiple repetition maximum (M-RM) strength tests are suitable alternatives to the 1-repetition maximum (1-RM) strength test, particularly in the elderly. In comparison to the 1-RM strength test the research about the reproducibility of M-RM strength tests is very limited, leading to a lack of standardized test protocols for M-RM strength tests. Therefore, the aim of this study was to assess the test-retest reproducibility of a 5-repetition maximum (5-RM) strength test in older adults. METHODS: After a short preparation session, 28 healthy elderly people older than 60 years (14 men, 14 women) and with…at least 3 months strength training experience passed a 5-RM strength test. The test included exercises for the upper body, namely bench press and seated row, and were performed twice within 7 days on the same day of the week at the same time of the day. RESULTS: Significant differences between test and retest (p < 0.05) in 2/6 instances provide evidence of practice-based improvement (PBI). A very high intraclass correlation coefficient (ICC > 0.90; p < 0.001) was found for the total sample as well as for both sub-samples (men, women). The coefficients of variation were very low and ranged between 0.7 and 2.8%. The high test-retest reproducibility was also demonstrated by the narrow limits of agreements, the very little standard errors of measurements and the minimal smallest real differences. CONCLUSION: The present study confirms the reproducibility of the 5-RM strength test for upper body exercises in older adults with strength training experience. The 5-RM strength test is a reliable and simple measurement and can be used in sports practice for theoretical and practical purposes.
Keywords: Maximum strength, strength diagnostics, strength training, training load