Trek Arm Trainer | Multi-Functional Strength Equipment, High-Strength Metal SpringTransform Your Workout with the Twister Arm Trainer The Twister Arm Trainer is your ultimate solution for achieving a comprehensive upper body workout. This innovative fitness equipment is designed to target multiple muscle groups, including your chest, arms, biceps, abs, shoulders, back, and thighs. With the included training guide chart, you can easily follow along and maximize your workout efficiency. Key Features Unique design stimulates multiple