Versatile upper body and core training This twister arm trainer targets arms, chest, shoulders, back, and inner thighs, enabling a comprehensive upper body routine and varied workouts. Customizable resistance for personalized progress Adjustable resistance from 30 to 40 kg lets you tailor the intensity to your level. Easily switch between different strengths to match your current fitness and advance at your own pace. Durable, effective steel construction with stable dual springs Made from high quality steel, this chest exerciser features a stable dual spring design for smooth rebound and consistent resistance. The design helps maintain proper posture during exercises to support muscle development. Ergonomic U shaped handle for secure, comfortable grip The handle fits naturally in the hand and provides a secure grip. Wrapped in two tone foam, it offers a soft, comfortable feel and reduces pressure during workouts. Compact, sturdy, performance oriented Designed for regular home use with a durable build that supports a range of movements and routines. The setup integrates easily into existing workouts. Use scenarios - Full upper body workout at home: combine arm rotations, chest presses, shoulder work, back rows, and torso twists to engage multiple muscle groups in one session. - Core and rotational training: perform torso twists to target obliques and the midsection while maintaining proper posture. - Beginner warm up or rehabilitation style session: low resistance movements to ease into training, with the option to increase resistance as strength improves.