The Development and Validation of a Low-Cost Timing Gate Prototype as an Alternative to a Stopwatch in Agility Testing. - Chaeroni, Ahmad; Huda, Asrul; Mardyansyah Simbolon, Muhammad Eka; Ayu Firdausi, Dzihan Khilmi; Pebriandani, Catur; Andristi, Ghina (Physical Education Theory & Methodology, 2025)