Portable multi-level spring trainer designed for progressive upper body and core conditioning Why you need this Adjustable resistance lets you progress safely through training stages and build strength over time. U-shaped structure creates more even force distribution for safer, more effective chest and upper body workouts. Durable spring design with professional rebound performance ensures reliable resistance and long service life. Non-slip foam handles provide a comfortable, secure grip so you can focus on exercise technique. Compact and lightweight for use at home, outdoors, or on the go. Key benefits Progressive training: Three resistance levels accommodate beginners through advanced users and support gradual strength improvement. Targeted muscle work: Effective for chest muscle training, hip strength, and abdominal exercises. Safety and comfort: U-shaped frame and foam handles reduce strain and minimize slipping during use. Durable materials: Stainless steel spring combined with professional high-carbon spring design for strong rebound and long-lasting performance. Portable design: Space-saving, easy to carry and store so you can train wherever you are. Who it is for Strength trainers and fitness enthusiasts Male users looking to improve upper limb muscle lines Anyone seeking a portable tool for chest, hip, and abdominal conditioning Specifications Material: stainless steel spring, foam Size: 65-68CM (level 1, 2, 3, different lengths) Net weight: about 1.6KG Application: hip strength, chest muscle, abdominal muscle training Typical use scenarios Home workout: Use the device for chest presses and core sets when you do short daily training sessions without bulky equipment. Park or outdoor training: Carry it in a bag to add resistance work to a jog or outdoor routine. Warm-up or targeted sessions at the gym: Use as a portable accessory for focused upper body activation before heavier lifts. Package contents Handle x 2 Spring x 2 Instruction manual x 1