The active muscles, such as the legs and thighs, are full of blood vessels. These blood vessels contain myoglobin (or muscle hemoglobin), which delivers oxygen to the muscles. The more myoglobin the muscles contain, the darker the muscle. Scientists often refer to these active muscles as slow-twitch fibers.
Background. Beef jerky is a type of snack food that is made by marinating beef in a curing solution and drying it. Meat treated in this way has a long shelf life and a unique flavor. Invention of this meat processing technology is attributed to Native Americans who smoke-dried meat to preserve it.
Originating in the northern part of California, jerkin is an urban dance style for the youth that's starting an epidemic around the nation. You can see people doing it at any house party or after school or even in a parking lot.