This damage consists of microscopic tears in the muscle fibers that make up the muscle and may involve injury to
the contractile elements within the muscle fiber as well as the surrounding tissue, the connective tissue that surrounds each muscle fiber.
As the myofibrils, with
their contractile elements, grow in size and number, the muscle becomes larger and stronger.
1) The first mechanism involves the synthesis of protein that is taking place within the muscle cell, including all segments of its structure like the connective tissues, cell walls and
contractile elements.