Reliability and Validity of an AI-Driven Smartphone Application for Measuring Countermovement Jump Height: A Comparison with Force Platform, Infrared Optical Timing, and Manual Video Analysis - Rios-Gallardo, Pablo Tadeo; Carranza-Garcia, Luis Enrique; Balsalobre-Fernandez, Carlos; Hernandez, Samuel Montalvo (Measurement in Physical Education and Exercise Science, 2026)