искривление оси позвоночника

Already in ancient Africa various vegetable substances which were used like a cocoon entered highly in a vagina were known. In the Egyptian papyruses it is described and the interrupted relations (coitus interruptus). Подробнее...

To sit it is necessary on sciatic bones. And not simply to sit, and to balance on these bones. In an ideal the back should not lean{base} on спинку a chair, is especial if спинка not vertical. Low armchairs with "позвоночной" the points of view in general very harmful. The flat seat of a chair should be shorter than a hip that the edge{territory} of a chair did not press on an artery under коленями. The height from a seat up to a floor should бытьтакой that hips settled down in parallel a floor. It is not necessary to put a leg{foot} on a leg{foot}. Подробнее...