Regardless of the underlying cause, the processes occurring in injured muscles tend to follow the same pattern. The rate of recovery varies from one type of injury to another and the magnitude at which your body is capable of restoring itself. You are like Wolverine — you regenerate.
The destruction phase starts with the actual trauma that causes muscle fibers to tear. Immediate necrosis of microfibers takes place due to deterioration of the sarcoplasm, a process that is halted within hours after the trauma by lysosomal vesicles forming a temporary membrane.
An inflammatory process takes place as a reaction on the torn blood vessels. Specialized cells start removing dead cells and parts of the fibers that was damaged.
In the repair and remodeling phase, the actual repair of the injured muscle takes place. Microfibers start regenerating out of satellite cells (= undifferentiated reserve cells) and a connective tissue scar is being formed in the gap between the torn muscle fibers. In the first 10 days after the trauma, this scar tissue is the weakest point of the affected muscle. After 10 days however, eventual re-rupture will rather affect adjacent muscle tissue than the scar tissue itself, although full recovery (up to the point of preinjury strength) can take a relatively long time.
Vascularisation of the injured area is a prerequisite for recovering from a muscle injury. New blood vessels grow from around the injured blood vessels and find their way to the center of the injured area. Early mobilization plays a very important role since it stimulates the blood vessel growth and supply cells to to repair the injured cells. nerves inside the muscle will regenerate to re-establish the nerve-muscle contact.