Large-diameter, densely packed myofibrils, large glycogen reserves, and few mitochondria are characteristics of

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Large-diameter, densely packed myofibrils indicate a higher force-producing capacity, which is a characteristic of fast fibers. Large glycogen reserves are also found in fast fibers, which require quick energy release for their rapid contraction. Few mitochondria are present in fast fibers as they rely primarily on anaerobic metabolism for energy production.

Large-Diameter, Densely Packed Myofibrils, Large Glycogen Reserves, and Few Mitochondria