Remaining in a sitting position tends to lowers venous return, as blood pools in the veins of the legs. In a person who is at rest, about half of the circulatory blood will be present in the veins, which can cause real problems when that pooled blood tries to return up to the heart.
Vic Firth. Everett Joseph Vic Firth (June 2, 1930 â July 26, 2015) was an American musician and the founder of Vic Firth Company (formerly Vic Firth, Inc.), a company that makes percussion sticks and mallets.
Single Ply. The most commonly used drumhead is the single ply. These heads are made from a single sheet of Mylar and usually come in 7, 7.5, and 10 mil thicknesses, with a few 12 mil models entering the market in recent years. (One mil equals one-thousandth of an inch.)