Comparative study of maximum number of reps and perception subjective effort
Abstract
It is believed that resistance exercise on unstable platforms may result in a greater demand for the neuromuscular system, increasing the activation of the stabilizing muscles of the trunk, which represents an additional stress to the skeletal muscles compared with the surface of stable platform. The aim of this study was to compare the perceived exertion by OMNI-RES scale and the number of repetitions performed at 80% of 1RM in the bench press exercise between stable and unstable surfaces. The sample consisted of10 trained women (age 22.5 ± 3.30). The 1RM test was applied for predicting maximal voluntary muscle actions (MVMA), described by Kraemer, Ratamess (2004). The bench press at the bank at 80% of 1RM until concentric muscular failure, without changing the movement pattern was performed 48h after the forecast of MVMA the bench press and the platform unstable (swiss ball) 48h after stable platform. For comparison of perceived exertion (OMNI-RES) and the number of repetitions regarding testing in stable and unstable platform, the 'Student t-test' was applied for paired samples. In all cases we adopted a significance level of 0.05. Statistical analysis was performed by processing and statistical analysis software "Statistical Package for the Social Sciences" (SPSS Science, Chicago, USA), version 17.0.
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