A number of jobs in today's offices - particularly those involving computers - are performed in a slightly elevated seated positions and / or in a mainly forward tilting working posture. In these cases, a lightly forward sloping seat stops the pelvis from sliding back; the larger angle between the thigh and upper body also takes the strain off the body. A number of Interstuhl models therefore offer the option of adjusting the forward seat tilt by up to -4°.