[Mechanical Fly] mainly exercises the chest muscles. Adjust the handle to the same height as the chest line. In the preparation position, the elbow joint is slightly bent, and the olecranon of the elbow joint is convex toward the back of the body. Exhale and pinch inward, and slowly straighten the elbow, keeping it slightly bent at the end. Inhale and slowly return to a slightly bent position. Pay attention to not compressing the wrist joint, not locking the elbow joint, and not lifting the shoulder joint during the movement. Repeat 12 times for three cycles.