The concurrent validity and reliability of the My Jump Lab smartphone app for the real-time measurement of vertical jump performance.

This article focuses on evaluating the concurrent validity and intra-session reliability of the My Jump Lab (MJL) mobile application for real-time measurement of countermovement jump (CMJ) height compared to a force plate, the gold standard in jump assessment. In a study involving 36 recreationally active men, jump heights measured simultaneously by the MJL app and force plate showed a very high correlation (r = 0.969) and excellent agreement, with minimal mean differences and comparable reliability metrics such as standard error of measurement and coefficient of variation. The MJL application’s automatic jump detection feature offers practical advantages over manual frame-by-frame analysis by reducing time, effort, and potential user error, enabling real-time feedback for athletes. The study concludes that MJL is a valid and reliable tool for assessing CMJ height, with potential benefits for sports practitioners in monitoring and enhancing athletic performance.