Lower body power and asymmetries test-retest

The aim of the present study was to evaluate the temporal stability, over one week, of a lower body power assessment protocol performed on a horizontal leg press, equipped with isoinertial technology coupled to a sensor to measure the speed of execution and to a computer software for data analysis. Seven 15-year-old soccer players from the youth academy of a professional club were evaluated. The process consisted of 3 phases: familiarization session, first evaluation and second evaluation, with periods of 1 week between each phase. The values of mean power, maximum peak power, mean peak power, mean velocity, maximum peak velocity and mean peak velocity were recorded for both the concentric and eccentric phases in bilateral execution, execution with the left leg and finally with the right leg.