The centre of rotation is right in the
middle of the seat and the floor, which enables the natural primal movement of the spine, it strengthens back and abdominal muscles, it forces the user into proper posture and prevents the back pain.
The centre of rotation is on the bottom in contact with the ground, caus- ing a long arc of movement that a ects the unnatural spine position and incor- rect posture when sitting, which leads to back pain.
The seat is rotating itself, which results in short arc of movement, and therefore the lower part of the back en- dures the highest tension. The spring also drags the spine back to its centre which leads to back pain.
A chair with specially designed restraints for back and hands grabs the lower back and completely relieves the back muscles, which leads to underdeveloped muscles that do not support the spine and thereby damage to the spine.
What are Active Chair’s advantages?
Active Chair is the only chair in the world that doesn’t “stand on its own feet” and is the only one that understands your body.
It means that for the seat’s movement, it doesn’t use springs or tires, but instead, a special ball joint that enables sitting in the same position for a longer period of time. It is not possible to lounge on it, your body is constantly moving to nd the optimal position, possible only when sitting upright – as is the natural position of the spine.
Active Chair, because of its central location of the axis, enables the body the most natural movement during sitting. Current solutions sold on the market have too short or too long of a range of seat movement, which can cause unpleasant feeling and pain.
Passive ergonomic o ce chairs work in the opposite way. They are very comfortable, so they assure the muscles to rest and enable a long-term still sitting, which causes the vertebrae to collapse and is very harmful to one’s health.