Triple spring resistance system provides progressive training adaptation for muscle activation and strength building through multilayer muscle sculpting U shaped design engages the core and targets pectoral, shoulder, and thigh muscles, while enabling wider motion paths for advanced workout results Zero movement ensures safety and durability with a reinforced spring rod structure and triple locking buckles that prevent load displacement and protect joints during use Portable convenience combines a lightweight design with a folding architecture for effortless 3second quick disassembly and compatibility with standard storage bags for home and travel versatility Use scenarios At home fullbody and upperbody routine: Perform chest, shoulder, arm, and core work with a single compact trainer, enabling multimuscle engagement without bulky equipment. Office break or quick mobility session: Use during short breaks to activate upper body and core, improve circulation, and reduce stiffness with a compact, easytostore device. Travel or hotel room workouts: Take advantage of the lightweight, foldable design for easy packing; quick setup and disassembly support consistent training while away from home Key attributes Function: triple spring resistance for adjustable load and progressive strength development; U shaped design for comprehensive muscle engagement; reinforced construction minimizes movement and protects joints Compatibility: suited for home use and travel; folds compactly and fits standard storage bags Size and portability: lightweight construction with folding architecture; 3second quick disassembly for fast setup and packaway Material and performance: reinforced spring rod structure and triple locking buckles deliver load stability and longterm durability for repeated use Durability and safety: design reduces load displacement to protect joints and maintain consistent performance across workouts