Triple Spring Resistance Experience progressive training adaptation with a triple spring resistance system. This setup activates multiple muscle groups for strength building and multilayer muscle sculpting. U Shaped Design The U shaped build engages your core while targeting the pectoral, shoulder, and thigh muscles. It allows wider motion paths to support advanced workout results. Zero Movement Reinforced spring rod structure and triple locking buckles work together to prevent load displacement. This design protects joints and provides durable, consistent use. Space saving Design Lightweight and space efficient, the arm trainer disassembles in 3 seconds for quick setup and storage. It securely fits standard storage bags for easy transport and storage. Key attributes Function: portable arm trainer with triple spring resistance for upper body and core training Compatibility: quick disassembly in 3 seconds; suitable for home use and travel; fits standard storage bags for transport Size and weight: designed to be lightweight and space saving Construction: reinforced spring rod, triple locking buckles for secure load management Performance: provides stable resistance, prevents load movement, supports protective joint use and durable performance Use scenarios Home workouts: perform full upper body or core conditioning routines with progressive resistance Travel or on the go: easily packs for hotel rooms, offices, or other small spaces; quick setup and pack away Mobility and activation sessions: use for controlled resistance to activate targeted muscle groups and improve range of motion Notes All features described align with the original product design: triple spring resistance, U shaped design for core and multimuscle engagement, reinforced zeromovement system, and 3second disassembly with travelready, storagefriendly form.