The height of the seat surface is most significant impact on the attitude and workability. Such as bathroom chair the entire lower the seat surface body is stable, tends to put a force on the hand. However the transition to standing position is difficult, use of long-term for that would be rounded back to take the burden on the body. On the other hand if the seating surface is high, the posture of the body will be better. But the burden of the lower extremities Many of that. Workability is high, because almost a standing position, the transition is also smooth to walking. In addition, the seating surface of the angle and softness, depth is also an important factor. 

The chair you use a long time in such as office work backrest is essential. Back angle and height, the angle between the backrest and the seat are considered. 

Balance chair is a chair that takes an intermediate position of sitting straight and upright. Seat surface is tilted forward, supporting the movement that tries to Zuriochiyo before in the knee, I have a strange appearance. Inventor is in childhood, was born from that was the play that sit tilted forward the seat surface of the chair of the school. In addition, Hans Christian Mengshoel is also said to have inspired from the posture of yoga. 

With the weight is distributed in the hips and knees, naturally spine if sit for a straight stand depicts an ideal S-shaped curve, the burden on the Koshikatakubi is dramatically improved. Since the thighs of pressure is also reduced, blood circulation is likely to edema or numbness is hampered by foot problems are also dramatically reduced. I said that the chair of office work orientation. Human skeleton is not a structure that can be maintained long by bending the spine and femur in 90 degrees, the seat sits the horizontal of the chair, rounded always spine in order to reduce the burden on the waist stoop by paying attention to the point that tries to posture is made​​, it is ergonomically very good design.