Efeito do treinamento de força utilizando protocolos com diferentes durações das repetições no perfil cinético e no desempenho em um teste de 1RM

Abstract

The effect of the variables manipulation associated with the strength training protocol is investigated in order to understand how different configurations of these protocols can contribute to optimize the adaptations caused by training. Although mechanical stress is pointed out as an important factor to induce adaptations to strength training, information about the force x ROM ratio (kinetic profile) in a maximum strength test (e.g. 1RM test) before and after a training period are still scarce. Data related to the kinetic profile of performance in a 1RM test can contribute to a better understanding of individual strategies in force production throughout the ROM. It is also worth questioning whether the kinetic profile recorded during a 1RM test can be modulated in a specific way by training protocol configuration. Therefore, investigating whether protocols with different repetition durations (different kinetic profiles) can modify the kinetic profile of a 1RM test and whether the protocols interfere differently in increasing the test performance, will allow to expand the understanding regarding the training prescription, considering this mechanical perspective. Nine male aged between 18 and 30 years who have been at least six months did not participate in a strength training program participated in this study. Two training protocols were used for 14 weeks, configured with 3 to 4 sets with the maximum number of repetitions, 3 minutes of pause between sets and intensity between 50 and 60% of 1RM in the unilateral knee extension exercise. The protocols were differentiated by the duration of repetition: one with 2 seconds (2s) and the other, 6 seconds (6s). The protocols promoted similar gains in the performance of maximum dynamic strength (1RM test), as well as they do not alter the kinetic profile of the 1RM test, promoting gains in force values across the ROM, with no difference between the protocols.