💪🔥 The Perfect Cable Chest Fly (Most People Do It Wrong) The cable chest fly is one of the most effective isolation exercises for chest growth — but only when done with proper form. Most people pull with their shoulders, losing the deep squeeze that truly activates the chest. Maintain a slight forward lean, keep a soft bend in the elbows, and bring your hands together in a wide arc until your chest fully contracts. Control the stretch, pause at peak tension, and move slowly to engage every fib