40-100lb Spring Arm Trainer

Dimensions: Not specified in original description. Weight: Not specified. Resistance range: 40–100 lb via interchangeable springs. Constructed from durable metal. Compact and portable design with fully detachable spring components for easy storage and transport. The Twister Arm Trainer delivers targeted resistance training for chest, shoulders, and arms through rotational and pressing motions. Its adjustable spring system allows progressive overload — users can start at 40 lb and advance to 100 lb as strength improves. The mechanism supports multiple movement patterns including arm twisting, chest presses, and shoulder rotations — all without requiring fixed anchoring or bulky equipment. Ideal for home use where space is limited, for travel due to its lightweight and modular build, or for outdoor fitness sessions. No assembly required; simply attach the desired spring and begin training. Designed for consistent daily use by fitness enthusiasts seeking functional upper-body conditioning.