It is a favorite way for many people to exercise shoulder muscles with a stretcher. One of them is a one-arm flat extension. It concentrates the pressure of exercise on the lateral head of deltoid muscle, which not only shapes the shoulder clarity, but also acts on the front and back of deltoid muscle, changing the unevenness of muscle. Another point is that one arm can exercise heavier. Action essentials:

(1) Stand up straight, with one arm hanging at your sides, holding the handle connected to the floor pulley, and the other hand on your hips.

(2) Keep your arms straight, pull the handle smoothly, and draw an arc with your hands in the air until your hands are higher than your head. Then, slowly put your arm back to the thigh position.

(3) Complete a set of actions in this way, and then switch to the other hand.