Abstract
Abstract Introduction: Several tests can predict the maximum weight an individual can lift using submaximal weights, which has been widely used in resistance training and clinical rehabilitation, but the reliability of these tests is not well documented. Objective: To analyze the test relative and absolute reliability of 10 maximum repetitions in the supine vertical bench press and leg extension machines. Method: Twenty-three healthy, untrained, and sedentary adults participated in the study. The test and retest evaluations were performed on the supine vertical press and leg extension machines. The retest was performed seven, 14 or 21 days after the test. Results: Intra-class correlation coefficient (ICC) was classified as very high (0.99) for upper limbs and (0.98) for lower limbs. The results for minimum detectable change (MDC) for the bench press resulted in a total of 2.77 kgf of actual change between test and retest, with an MDC% of 11.46%. For the leg extension, we found 3.15 kgf with MDC% of 8.94%. In both exercises, we obtained an MDC% below 30%, therefore acceptable. Conclusion: The 10RM test with the supine vertical press and leg extension has a very high relative reliability and an MDC acceptable for young, untrained and sedentary adults.
Highlights
Several tests can predict the maximum weight an individual can lift using submaximal weights, which has been widely used in resistance training and clinical rehabilitation, but the reliability of these tests is not well documented
The objective of this study was to evaluate the relative and absolute reliability of the 10 Repetições Máximas (10RM) test with weight machines in the upper and lower limbs, using the supine vertical bench press and the leg extension machines, respectively. This was a reliability test of the retest study type in which 23 healthy, untrained, sedentary adults participated in the study
Despite the findings regarding the Intra-class correlation coefficient (ICC), it is prone to restrictions as it includes terms of variance for individuals, not allowing to view the possibly acceptable error that may have occurred in the measurements
Summary
Several tests can predict the maximum weight an individual can lift using submaximal weights, which has been widely used in resistance training and clinical rehabilitation, but the reliability of these tests is not well documented. Objective: To analyze the test relative and absolute reliability of 10 maximum repetitions in the supine vertical bench press and leg extension machines. Conclusion: The 10RM test with the supine vertical press and leg extension has a very high relative reliability and an MDC acceptable for young, untrained and sedentary adults. According to Kraemer in 1983 [10], these variables include exercise selection, execution order, number of sets, intensity (weight used), duration of rest period, as well as speed and frequency of training Among these variables, intensity (weight used) is considered by some authors as the most important to be controlled while performing a RT program [11, 12], since it limits the number of repetitions and the recovery time required during the exercises and influences the effects of RT on strength and physiological adaptations. Intensity (weight used) can be determined through various tests [13], such as the maximum repetitions test
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