To relax the shoulder and neck muscles, there are two main aspects: 1. The back of the seat, as far as possible, and head back slightly, so that the entire neck, shoulders, back muscles in a relaxed state, and must pay attention to warmth, to avoid cold. In addition, when sleeping at night, the pillow should not be too high, generally about a fist high, padded in the back of the head against the position, so as to maintain the normal physiological curvature of the cervical spine, this action to maintain the state can effectively allow the neck, shoulders, back muscles in a relaxed state.