Congestion muscle

"Congestion Muscular" is what you feel in the muscle when it placed under constant tension.
This comes when you stretch the muscle and contracted by a high number of repetitions. When muscles are congested, are filled with a lot of blood, making them bigger and tight.

In the medical books, it's called hiperremia.
This happens because while these lifting and lowering a weight (stretching and shrinking) the body begins to mandar blood across the arteries and veins to the muscle.
However, such as doing several repetitions, one after the other, those sending more and more blood to the muscle, resulting in that is filled.

Some of the ways to increase the size of muscle is to make the muscle fibers that make up engrandezca, and this is achieved by increasing labile, which are "temporary proteins." The # 1 way to achieve this is to overload the muscle with blood.