negatively regulates negative regulation of cell development skeletal muscle fiber development regulation of skeletal muscle fiber development negative regulation of skeletal muscle fiber development downregulation of skeletal muscle fiber development negative regulation of skeletal muscle fibre development GO:0048744 negative regulation of skeletal myofibre development Any process that stops, prevents, or reduces the frequency, rate or extent of skeletal muscle fiber development. Muscle fibers are formed by the maturation of myotubes. They can be classed as slow, intermediate/fast or fast. down-regulation of skeletal muscle fiber development negative regulation of skeletal myofiber development biological_process down regulation of skeletal muscle fiber development negative regulation of striated muscle cell differentiation biological regulation