When comparing Chronojump and My Jump 2 (now often updated as My Jump Lab) for validating athlete performance metrics, sports science research shows that both systems demonstrate excellent reliability and strong scientific validity for measuring vertical jump height (r > 0.95, ICC > 0.97). However, they rely on entirely different technologies, which dictates how they fit into an athlete’s training or testing workflow. Technology & Measurement Methods
Chronojump: An open-source, hardware-based system that primarily utilizes a physical contact mat platform connected to a computer. It measures flight time based on electronic connections—recording the exact millisecond an athlete leaves the mat and returns to it.
My Jump 2: A mobile application that uses a smartphone’s high-speed camera (120 to 240 frames per second) to calculate flight time. The user manually selects the exact video frames corresponding to the athlete’s take-off and landing. Performance Metric Validation
Validated in numerous sports science journals—ranging from youth soccer to elite judo players—the two systems yield highly accurate data for vertical tests like the Countermovement Jump (CMJ) and Squat Jump (SJ).
Reliability and validity of My Jump 2® app to measure … – PMC
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