Sometimes when your calcium/magnesium ratio is off, you can get twitching. I get one in my diaphram that feels like a fish flopping in my chest. If you are low in calcium intake, or very low in magnesium, the muscles do a dance of sorts. So you could try to balance that out.
(February 2017) A concrete slab is a common structural element of modern buildings. Horizontal slabs of steel reinforced concrete, typically between 4 and 20 inches (100 and 500 millimeters) thick, are most often used to construct floors and ceilings, while thinner slabs are also used for exterior paving.
concretenoun [ U ] uk â /ËkÉÅ.kriËt/ us â /ËkÉËn.kriËt/. B2 a very hard building material made by mixing together cement, sand, small stones, and water: reinforced concrete. a concrete floor/path. a grey concrete building. More examples. The bomb shelter has concrete walls that are three metres thick. The foundation of the house is built from rubble overlaid with concrete.