2.3.3. Squat Jump Test (SJ)
During the SJ, participants were instructed to lower into a stationary semi-squatted position without any load at a 90° angle to the knees and hold for 2 s. They then performed a maximal vertical jump without performing a previous countermovement, as required, on an infrared jump system (Optojump, Microgate, Bolzano, Italy) interfaced with a microcomputer. We verified that no previous countermovement was used during the trial. A two-minute rest period was allowed between each of the three repetitions. For our analysis, we kept the highest jump.