On a saddle chair the knees and hips are at a 135 degree angle which decreases the pressure on the cartilages. This improves metabolism and reduces the risk of joint ailments.
When using a conventional chair, there is a 90 degree angle between the thighs and the upper body, as well as in the knees. The sharp angle tightens the main tendons and ligaments and creates more pressure on the cartilages. This has a harmful effect to the metabolism of the hip and knee joints.
In traditional sitting, the weight of the upper body increases the pressure on the hip joint upper cartilage. On a saddle chair the hips and the knees are in a 135 degree angle, which decreases the pressure on the cartilages. This improves the metabolism and reduces the risk of joint ailments. Being higher than the average office chair, the saddle chair is also healthier for the knees when standing up.