Due to the increasing tension, spreading centrifugally from the pelvis, the back muscles tense up more and more.
A tensed up muscle basically is a shortened muscle.
The back muscles are fixed to the bony spine.
When the back muscles tense up, they immediately pull at the bony spine. This is the reason, why some things happen at the same time:
Hyperlordosis (hollow back), hyperkyphosis (round back) and scolioses (laterally curved spine) are an exclusive and direct consequence of a pelvic damage in the sense of the SMT®.
Each other explanation for these phenomena is principally wrong.
The correctly by the classical medicine postulated weakness of the muscles (by the way, this basically counts for the whole musculature of the human body), results out of a tenseness and not of a lack of training.
In the contrary, when you consider the just made statements and the article "Consequences of the pelvic damages in the sense of the SMT® for the straightening and keeping upright of the spine", which can be confirmed by any structural engineer, you inevitably come to the conclusion that, with a training of the back muscles, you achieve just the contrary of what you really want. When you increase the muscle mass by a muscle training - each muscle grows bigger when it is often demanded - and a pelvic damage in the sense of the SMT® exists, the muscle tension in the back muscles also increases, which causes increasing traction work and also the compressive load of the spine, which again causes an augmentation of the intensity of scolioses, hollow- or roundbacks and also of the ailments due to these findings.
More muscles = more tension = more crooked spines.
The same reflections are principally also valid for the training of the abdominal muscles. The big front abdominal muscle runs from below to above over the middle of the belly. It produces a traction work, which hinders the inner organs to move towards the front too much. When the tensible force increases too much, because the abdominal muscles tense up due to subluxations of hip-, Iliosacral joints and pubic bone and/or intensive training of the abdominal muscles, the upper body is pulled forward, which worsens round back and scolioses of the spine.
Decent to moderately severe scolioses disappear nearly at once, as soon as the tension in the back muscles have been eliminated by treating the causual responsible damages in form of subluxations of hip-, pubic bone- and Iliosacral joints as well as tilts and inclinations of the pelvis.
The cause for a scoliosis consequently is an increased tension of the back muscles, which again is caused by subluxations of the leg joints, the joints of the pubic bone and the Iliosacral joints with the resulting tilt and inclination of the pelvis.
The forming mechanisms for scolioses of the lumbar- and the thoracal spine however have other backgrounds.