Muscle rupture in the back
A muscle rupture in the back occurs when the muscle fibers (muscle cells) are overloaded and damaged. This can happen if the muscle is stretched suddenly or during a movement where the muscle cannot cope with the load. A stretch means that the muscle has been stretched beyond its normal capacity. If only part of the muscle is injured, it is called a partial rupture. If the whole muscle is torn off, it is called a complete rupture.