Sprint athletes, on the other hand, require large numbers of type 2 b fibers.

Toraymyxin, (Polymyxin B fiber column), by Toray had 28 day mortality reduced by 21% compared to the conventional therapy group.

Although Type B fibers are thicker than Type C fibers, they are myelinated, and thus are blocked before the unmyelinated, thin C Fiber.

CALCIUM BUILDUP AND DAMAGE As the energy-producting bodies called mitochondria are exhausted in type 2 B fibers, they may let large amounts of calcium build up, activating destructive enzymes.

While marked differences in the metabolic potentials between FT a and FT b fibers are observed in untrained humans, the absolute level for the activities of oxidative and glycolytic enzymes in all fiber types is large enough to accommodate substantial aerobic and anaerobic metabolism (Saltin et al. 1977).

In untrained individuals, the proportion of ST fibers in the vastus lateralis muscle (the largest of the quadriceps muscles and the most commonly studied muscle in humans), is typically around 55%, with FT a fibers being twice as common as FT b fibers (Saltin et al. 1977).