The Shape of Modern Upholstered Sitting Furniture and Abdominal Weight Gain

Postural changes cause musculoskeletal changes.
Adverse musculoskeletal changes promote further adverse postural changes.

The shape and softness of modern style seating furniture makes it impossible to sit on them without rolling the pelvis fully backwards. Sitting for a significant amount of time on modern sitting furniture will result in adverse musculoskeletal changes. Along with the process of musculoskeletal change, the process of fat formation also happens.


On the one hand, the shape of the sitting furniture, and on the other hand, the softness of the sitting furniture determines the biomechanics of sitting.

Modern upholstered seating furniture is responsible for adverse musculoskeletal changes because it forces an extremely bad sitting posture.

  1. The biological basis of fat mass formation (fat mass progression) is the process of inflammation of the fat tissues.
  2. The mechanism underlining fat mass formation is the process of inflammation induced by excessive mechanical stimulations on fat tissues.

In a sitting position, excessive fat mass in the abdominal region is caused by excessive static mechanical stimulations induced by the weight of the upper part of the body (the part of the body above the waistline).

The waistline is depressed by a significant part of the upper body weight (the part of the body above the waistline). The weight of the upper part of the body (part of the body above the abdomen) induces excessive static mechanical stimulations (SMS) in the abdomen.

Pelvis rotated fully backwards in a sitting position is the factor that obstructs the abdominal muscles to be physically active. Despite physical inactivity of the abdominal muscles, they are not in a resting position because the weight of the part of the body above the abdomen lies on them.

  1. The abdominal muscles and the abdominal fat tissues are compressed by the weight of the upper part of the body (the part of the body above the abdomen).
  1. In this case, the fat tissues and muscles around the abdomen are affected with excessive static mechanical stimulations produced by the weight of the body above the abdomen.
  1. Excessive mechanical stimulations cause the inflammation of fat tissues.
  1. The process of inflammation of the fat tissues is also the process of fat mass progression.

While rolling the pelvis fully backwards in a sitting position, the abdominal muscles and fat tissues are affected with an excessive static mechanical stimulation at the same time as the size of the abdominal cavity is compressed. The working and living space of the internal organs is reduced.