The single-leg vertical jump was assessed using the OptoGait System (Microgate, S.R.L, Bolzano, Italy, 2010) to measure the maximum height, flight time, and ground contact time. Single-leg vertical jump performance was evaluated based on higher jump heights, longer flight times, and shorter ground contact times [26 ]. The set-up involved two parallel bars equipped with sensors placed on each side and a camera positioned in front. After removing their shoes, the participants stood between the bars. They were instructed to “please jump as high as possible, five times,” with the command being loudly given [27 (link)]. Data collected from these five jumps were processed using OptoGait software (Version 1.5.0.0, Microgate, S.R.L). Variables for the single-leg vertical jump were analyzed based on the average maximum height, flight time, and ground contact time extracted from the data. The test–retest reliability of the OptoJump system for this assessment was high, with an intraclass correlation coefficient (ICC) of 0.982–0.989, low coefficient of variation (2.7%), and minimal random error (±2.81 cm), making it suitable for evaluating vertical jump height [28 (link)].
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