| 摘要 |
The invention provides an improvement of the sitting condition for the people of any age. The invention is two spherical segments on the same base. Air filled upper spherical segment of the invention allows by its form to place the low part of the vertebra, tail base, of the user upper than other parts of the legs, this pose helps to avoid the disadvantages of motionless sitting and converts sitting process from hurtful to the healthful by creating the need to keep a balance with more muscle activity, than usually, which brings the body to the condition of very light constant movement of vertebra during the sitting. Low spherical segment of the invention by the changing the parameter of heights allows to the user to chose the level of the physical activity during sitting. |
