The main reason for back problems, especially in the lower back but also in the upper back, and worsening posture is sitting in a 90/90 position, which “forces” the back to round due to the structure of the pelvis. When the back is even slightly rounded, about 30% of support to the facet joints is lost, causing additional pressure on the intervertebral discs, which become compressed in the wedge-shaped gap. This exposes the discs to the risk of degeneration and herniation. Many ligaments and small muscles around the vertebrae also stretch to incorrect lengths in this sitting position, leading to a worsening posture issue, often beginning in adolescence.

Correcting sitting posture by using a two-part, swinging, and anatomically shaped (=not pressing on the inner thighs) saddle chair helps the back to recover and return to a healthy state. This process takes from a few months to 1-2 years, depending on age, weight, the amount of poor sitting, and physical activity. The two-part, swinging saddle chair provides space for the tissues of the pelvic floor and the pubic bone, allowing the pelvis to comfortably maintain a healthy standing posture, thereby aligning the spine correctly. The swing mechanism also activates small movements in the back, promoting critical fluid circulation (blood, lymph) in the tissues around and within the vertebrae, crucial for nutrient and oxygen supply, as well as the removal of waste products. This is further enhanced by repeated movement, such as getting up once an hour and wearing non-constricting clothes around the abdominal and pelvic areas.

The middle gap in the chair also improves the health of the genitals and internal pelvic organs by eliminating sitting pressure that hinders fluid circulation. No significant health benefits as mentioned above can be achieved by sitting on a regular chair in any way.