Reliability and validity of the skijumping technique factors

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The authors present research on ski jumping technique, focusing on dynamic and kinematic factors crucial for success in this technically demanding sport. They identify stability, reliability, and validity as key components for effective jumps. The technique is broken down into four phases: in-run, take-off, flight, and landing, with detailed explanations of their mechanical features. While these features are mechanically invariant, they exhibit variability in a ski jumper's movement style from a kinesiological perspective. The study examines inter-individual variability, noting differences among jumpers, and intra-individual variability, which highlights variations in an athlete's performance across multiple jumps. The primary goal is to assess the reliability of mechanical variables concerning inter-individual variability and to evaluate their stability regarding intra-individual variability. Findings aim to enhance training models, focusing on motor learning and optimizing movement execution. The research also addresses practical applications in ski jumping, potentially elevating the quality of technique. Additionally, it raises new questions for future exploration in sports science, including the biological, psychological, and social dimensions of ski jumping, and may serve as a model for other technical sports.