Once these adjustments are made, the system acts as an extension of your body. As you move, everything follows. You should be able to change easily from one comfortable position to the next throughout the day. By changing position, you promote circulation, reduce muscular fatigue, and dramatically increase productivity. Research suggests using seat to backrest angles which are opened far beyond the traditional 90 degrees, with seat orientations tilted forward or reclined.
Open angles promote better spinal posture.
This degree of position flexibility requires a completely new approach to equipment support. In an office chair, as you recline or move forward, the relationship to the fixed work equipment is compromised. You must readjust your equipment, or most likely your body, each time the seat position is changed. As you move, everything moves. The optimal viewing and working relationships are always maintained, regardless of how you change position throughout the day.