Researchers have developed a low-cost, flexible, and customizable sensor for badminton players that overcomes current monitoring constraints. The team used triboelectric sensors to construct their intelligent monitoring system because they are easy to adapt for flexible, wearable devices and to minimize interference during bending and twisting, they built a 3D-printed flexible arch-shaped sensor encased in a thermoplastic elastomer. This design is comfortable during use and can be easily customized to individual athletes.