The Soccer Coach. Marco Bruno

fiber.

      White type II fibers, clear, thick and rapid called FT (fart twitch = fast-twitch fibers).These fibers come into action in intense muscular stress and rapid force. Their capillarization is 2.9 capillaries, on average, per fiber.

      There are three sub-categories of FT fibers, namely:

      1 Type IIa fibers (oxidative-glycolytic capacity);

      2 Type IIb fibers (high glycolytic capacity);

      3 Type IIc fibers (high oxidative capacity and good glycolytic capacity, also called intermediate fibers).

      According to some research, champion athletes enjoy a genetic privilege. The research has discovered a DNA gene called "alpha-actinin-3" that controls the production of actinin in muscle, a key constituent of fast-twitch fibers. The alpha-actin-3 gene exists in two main alternative forms, called “alleles”, given as a gift by each of the parents, which can be the same or different, can be presented with a double pair

       of RR alleles, determine the presence of the sprint protein in the muscle;

       of XX alleles, do not command the production of actinin;

       of RX alleles, partial actinin production, majority of the population