In terms of training coverage, the core muscle groups targeted include the pectoral muscles (upper chest/middle chest/lateral chest), arms (biceps brachii, triceps brachii, forearm flexors), shoulders (anterior deltoid/middle deltoid), and back (latissimus dorsi, rhomboids). Through movement variations, it can also activate the core abdominal muscles (during static exertion), gluteus maximus, and inner thigh muscles. Compared to traditional straight-bar arm trainers, its U-shaped structure increases the range of motion by 15°-30°, enabling multi-angle stimulation of muscle fibers and eliminating training blind spots.