Associação entre a variação de velocidade, repetições totais e acurácia de repetições em reserva

Abstract

This study investigated the relationship between mean bar velocity variation, total number of repetitions, and the accuracy of repetitions in reserve (RIR) estimation in advanced resistance-trained individuals. Fifteen volunteers performed four sets to failure of the bench press exercise on a Smith Machine using a load corresponding to 50% of their one-repetition maximum. The average number of repetitions per set, the RIR estimation error, and barbell velocity variation—measured using a linear position transducer—were analyzed. The results showed a progressive improvement in RIR accuracy across sets, and a decrease in bar velocity from repetitions 8 to 10 in all sets. No significant correlations were observed between velocity variation and total repetitions in any set, nor between velocity variation and RIR accuracy. It is concluded that, under the tested conditions, barbell velocity does not accurately reflect total repetitions or RIR accuracy, especially when the load is low and failure is not achieved.