<![CDATA[General Background Sensor and Internet of Things technologies support data-driven training methodologies in modern sports science. Specific Background Badminton demands rapid footwork agility, visual-motor coordination, and fast reaction times to respond dynamically to game stimuli. Knowledge Gap Although various technological tools exist, their application remains fragmented across isolated devices without fully unified platforms. Aims This study analyzes the utility of sensor technologies and reaction light systems in improving athletes' agility and reaction time through a systematic literature review. Results Utilizing the PRISMA methodology across articles published from 2020 to 2026, 15 studies met the inclusion criteria, revealing that wearable sensors, inertial measurement units, reaction lights, and Internet of Things applications significantly improve visual-motor coordination, footwork, and real-time performance tracking. Novelty The systematic evaluation highlights the necessity of shifting from isolated device applications toward unified, data-driven intelligent training systems for racket sports. Implications Integrating these smart technologies provides coaches with objective, real-time diagnostic metrics to optimize athletic performance and program individual development. Highlights Wearable sensors and inertial measurement units provide objective data for analyzing footwork speed and movement patterns. Reaction light systems and visual stimuli significantly improve reactive agility and decision-making capabilities. Internet of Things integration facilitates real-time performance monitoring and data-driven training evaluations. Keywords Agility Training; Reaction Time; Sensor Technology; Badminton; Smart Training Systems]]>
