occurs in skeletal muscle hypertrophy biological_process The enlargement or overgrowth of all or part of an organ due to an increase in size (not length) of individual muscle fibers without cell division. In the case of skeletal muscle cells this happens due to the additional synthesis of sarcomeric proteins and assembly of myofibrils. GO:0014734 muscle hypertrophy striated muscle hypertrophy skeletal muscle adaptation skeletal muscle tissue