Based on studied carried out, wile shortness of the desk and lacking appropriate inclination, a curve may appear in shoulder and back of the person by bending them forward, which four or five upper vertebra of the back and 3rd and 4th cervical vertebra displaced forward and this displacement cause to more shoulder forward and thorax muscle causes to keep constant of shoulder forward, by it’s contraction and causing neck and shoulder pain in individual in long-term [14].