The heterogeneity of human skeletal muscle is illustrated
by the significant variability in the biochemical,
mechanical, and metabolic phenotypes of individual
fibers. In the human body, different muscles have different
relative predominance of the various fiber types. The
presence of fibers with different properties in the same
muscle may reflect an adaptation to different patterns of
activity imposed by the motor neurons. This diversity of
physiological properties is a very important property
because it allows the participation of a muscle in activities
with various metabolic and mechanical demands. The
architecture of capillary supply networks that supports
these metabolic demands varies depending on the fiber
type [22].