Predisposing factor – low physical activity
In the sitting position with the perineum resting on the chair, the load is removed from the pelvic diaphragm, as a result of which its muscles lose their tone, and are also squeezed between the seat and the overlying organs. Prolonged atony and compression ischemia of these muscles leads to their atrophy and dysfunction of the pelvic diaphragm. Likewise, a sedentary lifestyle leads to atrophy of the gluteal muscles, resulting in a decrease in the tension and elasticity of the pelvic floor.
The described inconsistency of the pelvic diaphragm in the standing position is accompanied by ptosis (omission) and prolapse (protrusion) of the pelvic organs, which aggravates the outflow of venous blood, which is already complicated by high hydrostatic pressure in the large veins of the vertical trunk. Thus, the combination of the listed factors of evolution and lifestyle determines the predisposition of a modern person to pathologies of the pelvic veins.
However, why does the disease first manifest and worsen at moments of strong muscle tension in loaders and weightlifters, despite their high physical activity, as well as in other people during bowel movements or during childbirth?
Trigger factor – high intra-abdominal pressure
It is well known that high pressure in the abdominal cavity is a trigger for the development of the disease. However, contrary to the opinion widespread among doctors, high intra-abdominal pressure is not something pathological, but has useful functions.
For example, heavy physical exertion on the spinal column in loaders and athletes reflexively uses the muscles of the abdomen, respiratory and pelvic diaphragms, the simultaneous contraction of which significantly increases intra-abdominal pressure in order to stabilize the spine.