Adjustable Resistance Range: 20 100KG adjustable range supported by the triple spring resistance system, enabling progressive training adaptation and targeted muscle activation Optimized Training Pathways: Expanded motion paths with the U shaped Arm Trainer, promoting pectoral, shoulder, and thigh stimulation, along with improved core engagement during workouts Joint Protection System: Triple locking buckles combined with a reinforced spring rod design deliver zero displacement under load, ensuring joint safety and longlasting support during workouts Portable Convenience: Lightweight design with portable folding architecture, this arm trainer offers effortless 3second quick disassembly while fitting standard storage bags for hometravel versatility Use scenarios Home strength sessions: Use the full adjustable 20 100KG range to progressively challenge chest, shoulder, thigh, and core muscles with stable control provided by the joint protection system Rehabilitation or jointconscious training: Rely on the joint protection system to prevent displacement and support safe, controlled workouts during recovery or therapy activities Travel, small spaces, and onthego training: Benefit from the lightweight, folding design and quick disassembly for easy transport and storage in standard bags while maintaining workout effectiveness