Ознакомьтесь с причинами возникновения Синдром мышечной скованности по мнению людей, сталкивавшихся с Синдром мышечной скованности
Оригинал
No one knows what causes SPS. However in my case and a few others I know of, there is some genetic component behind it, we just don't know what it is that makes it genetic in some cases and not in most others.